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Impact of rapid palatal expansion on the size of adenoids and tonsils in children. Sleep Med 2022; 92:96-102. [DOI: 10.1016/j.sleep.2022.02.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/06/2022] [Accepted: 02/13/2022] [Indexed: 01/03/2023]
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The importance of volume and area fractions of cerebellar volume and vermian subregion areas: a stereological study on MR images. Childs Nerv Syst 2020; 36:165-171. [PMID: 31494701 DOI: 10.1007/s00381-019-04369-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Accepted: 09/02/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE Age, gender, and body size are important factors which are affecting the cerebellar volume (CV). Many neurological diseases lead changes in CV. The aim of this study is to measure CV and the total intracranial volume (TIV) for both genders on magnetic resonance images (MRI), to calculate the CV/TIV volume fraction, and also to determine the normal values that can be regarded clinically significant by determining the total vermis area and vermian subregion areas (V1, V2, and V3). METHODS In this retrospective study, MR images (without any pathological findings) of 200 individuals (100 female, 100 male) between the ages of 20-40 were used. CV and CV/TIV volume fractions, vermian subregion areas, and area fractions were calculated by using the Stereoinvestigator 8.0 (Microbrightfield, USA) software. The volumetric calculations were performed by the point counting method according to the Cavalieri principle, which is one of the volume calculation methods in stereology. Total CV, TIV, cerebellar vermis areas (V1, V2, and V3), and total cerebellum area were measured separately for both groups. RESULTS The volume of cerebellum was 120.53 ± 11.1 cm3 in males, 105.99 ± 11.2 cm3 in females, TIV was 1304.99 ± 91.7 cm3 in males and 1155.15 ± 85.7 cm3 in females. CV and TIV were statistically higher in males (p = 0.001, p = 0.001 respectively). It was observed that the differences between the genders in terms of CV/TIV disappeared (p = 0.679). The total vermis area was 11.59 ± 1.3 cm2 in males and 10.85 ± 1.3 cm2 in females. V1 area, V3 area, and the total vermis area were found statistically higher in males (p = 0.05, p = 0.006, p = 0.007 respectively). It was determined that the area fraction of V2 was higher in females when the fractions of V1, V2, and V3 to the total vermis area were examined (p = 0.03). CONCLUSION We believe that the normal values of CV, TIV, and vermian subregion areas, determined by stereological method, will contribute to the diagnosis and the treatment plan of the clinical pathological evaluations in adults and children.
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Kayaci S, Tabak A, Durur-Subasi I, Eldes T, Koksal V, Sirin M, Arslan YK. Artifacts in cranial MRI caused by extracranial foreign bodies and analysis of these foreign bodies. Indian J Radiol Imaging 2019; 29:299-304. [PMID: 31741599 PMCID: PMC6857268 DOI: 10.4103/ijri.ijri_211_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 12/02/2018] [Accepted: 09/03/2019] [Indexed: 11/06/2022] Open
Abstract
Purpose: The purpose of our study was to conduct a chemical analysis of extracranial foreign bodies (FBs) causing artifacts in cranial magnetic resonance imaging (MRI) and to investigate the association between chemical composition, magnetic susceptibility, and artifact size. Materials and Methods: A total of 12 patients were included in the study. The FBs responsible for the artifacts were visualized using cranial computed tomography (CT). Artifact-causing FBs were removed from the scalps of 10 patients and analyzed using scanning electron microscope with energy dispersive spectroscopy (SEM-EDS), X-ray diffraction spectroscopy (X-RD), and Fourier-transform infrared spectroscopy (FT-IR). The magnetic susceptibility of the samples was determined using the reference standard material MnCl2.6H2O. The volume of the MRI artifacts was measured in cubic centimeters (cm3). Results: EDS results demonstrated that the mean Fe ratio was 5.82% in the stone samples and 0.08% in the glass samples. Although no phase peaks were detected in the X-RD spectra of the glass samples, peaks of Fe2O3, Al2Ca (SiO4) were detected in the X-RD spectra of the stone samples. The FT-IR spectra revealed metal oxide peaks corresponding to Fe, Al, in the stone samples and peaks confirming Al2SiO5 and Na2SiO3 structures in the glass samples. The mean volumes of the MRI artifacts produced by the stone and glass samples were 5.9 cm3 and 2.5 cm3, respectively. Conclusions: Artifacts caused by extracranial FBs containing metal/metal oxide components are directly associated with their chemical composition and the artifact size are also related to element composition and magnetic susceptibility.
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Affiliation(s)
- Selim Kayaci
- Department of Neurosurgery, Erzincan University, Erzincan, Turkey
| | - Ahmet Tabak
- Department of Chemistry, Faculty of Arts and Sciences, Sinop University, Rize, Turkey
| | - Irmak Durur-Subasi
- Department of Radiology, Dışkapı Training and Research Hospital, Ankara, Turkey
| | - Tugba Eldes
- Department of Radiology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Vaner Koksal
- Department of Neurosurgery, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Murat Sirin
- Department of Physics, Faculty of Arts and Sciences, Recep Tayyip Erdogan University, Rize, Turkey
| | - Yusuf Kemal Arslan
- Department of Biostatistics, Faculty of Medicine, Erzincan University, Erzincan, Turkey
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Baş O, Kayacı S, Beyza Çeliker F, Üçüncü Y, Özveren MF, Yilmaz A, Altas H, Sahin B. A comparison of lateral ventricle volume estimation on magnetic resonance and cadaveric section images using the planimetry method. J Clin Neurosci 2019; 64:264-268. [DOI: 10.1016/j.jocn.2019.03.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 03/25/2019] [Indexed: 11/16/2022]
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Abdullah JY, Rajion ZA, Martin AG, Jaafar A, Ghani ARI, Abdullah JM. Shape-based interpolation method in measuring intracranial volume for pre- and post-operative decompressive craniectomy using open source software. Neurocirugia (Astur) 2019; 30:115-123. [PMID: 30782505 DOI: 10.1016/j.neucir.2018.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 11/25/2018] [Accepted: 12/01/2018] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Intracranial volume (ICV) is an important tool in the management of patients undergoing decompressive craniectomy (DC) surgery. The aim of this study was to validate ICV measurement applying the shape-based interpolation (SBI) method using open source software on computed tomography (CT) images. METHODS The pre- and post-operative CT images of 55 patients undergoing DC surgery were analyzed. The ICV was measured by segmenting every slice of the CT images, and compared with estimated ICV calculated using the 1-in-10 sampling strategy and processed using the SBI method. An independent t test was conducted to compare the ICV measurements between the two different methods. The calculation using this method was repeated three times for reliability analysis using the intraclass correlations coefficient (ICC). The Bland-Altman plot was used to measure agreement between the methods for both pre- and post-operative ICV measurements. RESULTS The mean ICV (±SD) were 1341.1±122.1ml (manual) and 1344.11±122.6ml (SBI) for the preoperative CT data. The mean ICV (±SD) were 1396.4±132.4ml (manual) and 1400.53±132.1ml (SBI) for the post-operative CT data. No significant difference was found in ICV measurements using the manual and the SBI methods (p=.983 for pre-op, and p=.960 for post-op). The intrarater ICC showed a significant correlation; ICC=1.00. The Bland-Altman plot showed good agreement between the manual and the SBI method. CONCLUSION The shape-based interpolation method with 1-in-10 sampling strategy gave comparable results in estimating ICV compared to manual segmentation. Thus, this method could be used in clinical settings for rapid, reliable and repeatable ICV estimations.
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Affiliation(s)
- Johari Yap Abdullah
- Craniofacial Medical Imaging Research Group, School of Dental Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Zainul Ahmad Rajion
- Craniofacial Medical Imaging Research Group, School of Dental Sciences, Universiti Sains Malaysia, Kelantan, Malaysia.
| | - Arvind Gerard Martin
- Department of Neurosurgery, Hospital Tengku Ampuan Afzan, Jalan Air Putih, Kuantan, Pahang, Malaysia
| | - Azlan Jaafar
- Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur, Malaysia
| | - Abdul Rahman Izaini Ghani
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Jafri Malin Abdullah
- Centre for Neuroscience Services & Research, Universiti Sains Malaysia, Kelantan, Malaysia
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Ma D, Holmes HE, Cardoso MJ, Modat M, Harrison IF, Powell NM, O'Callaghan JM, Ismail O, Johnson RA, O'Neill MJ, Collins EC, Beg MF, Popuri K, Lythgoe MF, Ourselin S. Study the Longitudinal in vivo and Cross-Sectional ex vivo Brain Volume Difference for Disease Progression and Treatment Effect on Mouse Model of Tauopathy Using Automated MRI Structural Parcellation. Front Neurosci 2019; 13:11. [PMID: 30733665 PMCID: PMC6354066 DOI: 10.3389/fnins.2019.00011] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 01/08/2019] [Indexed: 11/29/2022] Open
Abstract
Brain volume measurements extracted from structural MRI data sets are a widely accepted neuroimaging biomarker to study mouse models of neurodegeneration. Whether to acquire and analyze data in vivo or ex vivo is a crucial decision during the phase of experimental designs, as well as data analysis. In this work, we extracted the brain structures for both longitudinal in vivo and single-time-point ex vivo MRI acquired from the same animals using accurate automatic multi-atlas structural parcellation, and compared the corresponding statistical and classification analysis. We found that most gray matter structures volumes decrease from in vivo to ex vivo, while most white matter structures volume increase. The level of structural volume change also varies between different genetic strains and treatment. In addition, we showed superior statistical and classification power of ex vivo data compared to the in vivo data, even after resampled to the same level of resolution. We further demonstrated that the classification power of the in vivo data can be improved by incorporating longitudinal information, which is not possible for ex vivo data. In conclusion, this paper demonstrates the tissue-specific changes, as well as the difference in statistical and classification power, between the volumetric analysis based on the in vivo and ex vivo structural MRI data. Our results emphasize the importance of longitudinal analysis for in vivo data analysis.
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Affiliation(s)
- Da Ma
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom.,School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
| | - Holly E Holmes
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Manuel J Cardoso
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Marc Modat
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Ian F Harrison
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Nick M Powell
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - James M O'Callaghan
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Ozama Ismail
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Ross A Johnson
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, United States
| | | | - Emily C Collins
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, United States
| | - Mirza F Beg
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, United States
| | - Karteek Popuri
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, United States
| | - Mark F Lythgoe
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Sebastien Ourselin
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
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Martini M, Klausing A, Lüchters G, Heim N, Messing-Jünger M. Head circumference - a useful single parameter for skull volume development in cranial growth analysis? Head Face Med 2018; 14:3. [PMID: 29321071 PMCID: PMC5764008 DOI: 10.1186/s13005-017-0159-8] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 12/22/2017] [Indexed: 02/05/2023] Open
Abstract
Background The measurement of maximal head circumference is a standard procedure in the examination of childrens’ cranial growth and brain development. The objective of the study was to evaluate the validity of maximal head circumference to cranial volume in the first year of life using a new method which includes ear-to-ear over the head distance and maximal cranial length measurement. Methods 3D surface scans for cranial volume assessment were conducted in this method comparison study of 44 healthy Caucasian children (29 male, 15 female) at the ages of 4 and 12 months. Results Cranial volume increased from measurements made at 4 months to 12 months of age by an average of 1174 ± 106 to 1579 ± 79 ml. Maximal cranial circumference increased from 43.4 ± 9 cm to 46.9 ± 7 cm and the ear-to ear measurement increased from 26.3 ± 21 cm to 31.6 ± 18 cm at the same time points. There was a monotone association between maximal head circumference (HC) and increase in volume, yet a backwards inference from maximal circumference to the volume had a predictive value of only 78% (adjusted R2). Including the additional measurement of distance from ear to ear strengthened the ability of the model to predict the true value attained to 90%. The addition of the parameter skull length appeared to be negligible. Conclusion The results demonstrate that for a distinct improvement in the evaluation of a physiological cranial volume development, the additional measurement of the ear-to ear distance using a measuring tape is expedient, and, especially for cases with pathological skull changes, such as craniosynostosis, ought to be conducted.
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Affiliation(s)
- Markus Martini
- Department of Maxillofacial and Plastic Surgery, University of Bonn, Sigmund-Freud Str. 25, 53127, Bonn, Germany. .,Department of Oral, Maxillofacial and Plastic Surgery, University of Bonn, Welschnonnenstraße 17, D - 53111, Bonn, Germany.
| | - Anne Klausing
- Department of Maxillofacial and Plastic Surgery, University of Bonn, Sigmund-Freud Str. 25, 53127, Bonn, Germany
| | - Guido Lüchters
- Center for Development Research (ZEF), University of Bonn, Walter-Flex-Str. 3, 53113, Bonn, Germany
| | - Nils Heim
- Department of Maxillofacial and Plastic Surgery, University of Bonn, Sigmund-Freud Str. 25, 53127, Bonn, Germany
| | - Martina Messing-Jünger
- Department of Neurosurgery, Asklepios Children's Hospital, Arnold-Janssen-Str. 29, 53757, Sankt Augustin, Germany
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Caglar V, Alp SI, Demir BT, Sener U, Ozen OA, Alp R. Planimetry investigation of the corpus callosum in temporal lobe epilepsy patients. ACTA ACUST UNITED AC 2016; 21:145-50. [PMID: 27094525 PMCID: PMC5107269 DOI: 10.17712/nsj.2016.2.20150783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Objective: To evaluate the effects of temporal lobe epilepsy (TLE) on corpus callosum (CC) morphometry in patients with TLE. Methods: This retrospective study was conducted at the Faculty of Medicine, Tekirdag Namik Kemal University, Tekirdag, Turkey between November 2010 and December 2013. The epileptic syndrome diagnosis was based on International League Against Epilepsy criteria, and this study was conducted on the MRIs of 25 epilepsy patients and 25 control subjects. We classified the patients according to their duration of epilepsy <10 and ≥10 years. The projection area length (PAL) of the CC was also estimated. Total brain volumes (TBV) were measured on CT images. Results: The mean values of TBV for patients with TLE and the control group were not statistically different, but the CC PAL values were statistically different. The mean CC PAL values of under and over 25 years of age in patients with TLE were statistically different. The mean values of TBV of under and over 10 years duration of TLE were small statistically, but the CC PAL values were statistically different. Conclusion: The results indicate a clear influence of TLE on the structure of the CC rather than TBV.
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Affiliation(s)
- Veli Caglar
- Departments of Anatomy, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
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Suh JG, Kim YS, Kim D, Park IS, Lee NJ, Rhyu IJ. Effects of body size on cranial capacity in Korean youth. Anim Cells Syst (Seoul) 2015. [DOI: 10.1080/19768354.2015.1018943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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10
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Sezgin OS, Kayıpmaz S, Sahin B. The effect of slice thickness on the assessment of bone defect volumes by the Cavalieri principle using cone beam computed tomography. J Digit Imaging 2013; 26:115-8. [PMID: 22539100 DOI: 10.1007/s10278-012-9480-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The purpose of this study was to investigate the possible effects of section thickness on volume estimations obtained by cone beam computed tomography. Intraosseal cavities representing bone defects on vestibular sides of the two dry sheep mandibles were scanned by a cone beam computed tomography system. Consecutive sections at 0.2, 0.6, 1, 1.4, and 2.2 mm thickness were used to estimate the volumes of the cavities using the Cavalieri principle of stereological methods. Estimated volumes are then compared with the volumes obtained by the Archimedean principle. In 0.2-, 0.6-, and 1-mm-thick slices, the volumes estimated by the Cavalieri principle did not differ from the volumes by the Archimedean principle (p > 0.05). The 0.2 mm slice-thickness group had the highest asymptotic significance value (p = 0.6). Although the thinnest slice appears to provide the most accurate values, slice thickness up to 1 mm can be chosen for volume calculations on CBCT images.
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Affiliation(s)
- Omer Said Sezgin
- Department of Oral Diagnosis and Radiology, Faculty of Dentistry, Karadeniz Technical Universty, Trabzon, Turkey.
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Jiang J, Sachdev P, Lipnicki DM, Zhang H, Liu T, Zhu W, Suo C, Zhuang L, Crawford J, Reppermund S, Trollor J, Brodaty H, Wen W. A longitudinal study of brain atrophy over two years in community-dwelling older individuals. Neuroimage 2013; 86:203-11. [PMID: 23959201 DOI: 10.1016/j.neuroimage.2013.08.022] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 07/26/2013] [Accepted: 08/11/2013] [Indexed: 10/26/2022] Open
Abstract
Most previous neuroimaging studies of age-related brain structural changes in older individuals have been cross-sectional and/or restricted to clinical samples. The present study of 345 community-dwelling non-demented individuals aged 70-90years aimed to examine age-related brain volumetric changes over two years. T1-weighted magnetic resonance imaging scans were obtained at baseline and at 2-year follow-up and analyzed using the FMRIB Software Library and FreeSurfer to investigate cortical thickness and shape and volumetric changes of subcortical structures. The results showed significant atrophy across much of the cerebral cortex with bilateral transverse temporal regions shrinking the fastest. Atrophy was also found in a number of subcortical structures, including the CA1 and subiculum subfields of the hippocampus. In some regions, such as left and right entorhinal cortices, right hippocampus and right precentral area, the rate of atrophy increased with age. Our analysis also showed that rostral middle frontal regions were thicker bilaterally in older participants, which may indicate its ability to compensate for medial temporal lobe atrophy. Compared to men, women had thicker cortical regions but greater rates of cortical atrophy. Women also had smaller subcortical structures. A longer period of education was associated with greater thickness in a number of cortical regions. Our results suggest a pattern of brain atrophy with non-demented people that resembles a less extreme form of the changes associated with Alzheimer's disease (AD).
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Affiliation(s)
- Jiyang Jiang
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Perminder Sachdev
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia; Neuropsychiatric Institute, Prince of Wales Hospital, Randwick, NSW, Australia
| | - Darren M Lipnicki
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Haobo Zhang
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Tao Liu
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Wanlin Zhu
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Chao Suo
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Lin Zhuang
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - John Crawford
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Simone Reppermund
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Julian Trollor
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia; Department of Development Disability Neuropsychiatry, School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Henry Brodaty
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia; Aged Care Psychiatry, Prince of Wales Hospital, Randwick, NSW, Australia; Dementia Collaborative Research Centre, University of New South Wales, Sydney, NSW, Australia
| | - Wei Wen
- Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia; Neuropsychiatric Institute, Prince of Wales Hospital, Randwick, NSW, Australia.
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Ritvanen AG, de Oliveira ME, Koivikko MP, Hallila HO, Haaja JK, Koljonen VS, Leikola JP, Hukki JJ, Paulasto-Kröckel MM. Mesh-based method for measuring intracranial volume in patients with craniosynostosis. Int J Comput Assist Radiol Surg 2013; 8:703-9. [PMID: 23443983 DOI: 10.1007/s11548-013-0822-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Accepted: 02/08/2013] [Indexed: 10/27/2022]
Abstract
PURPOSE Craniosynostosis may lead to reduced intracranial volume (ICV) and disturb normal brain growth and development. Thus, ICV is an important parameter with respect to the surgical outcome. Current methods for ICV determination from computed tomography (CT) images have drawbacks. The aim of this study was to investigate the performance of the novel mesh-based method (MBM) for ICV determination with craniosynostosis patients. METHODS Twenty-two patients operated on for scaphocephaly were included in this study. ICVs from preoperative, one-week postoperative, and one-year postoperative CT images were measured with MBM. The level of agreement with the manual segmentation method (MSM) was determined for the measurements of preoperative and one-year postoperative datasets. Repeatability was determined with re-measurements of six datasets. Measurement time was recorded for MBM. RESULTS Mean [Formula: see text] preoperative ICV values were 895.0 [Formula: see text] 153.1 [Formula: see text] and 896.4 [Formula: see text] 147.2 [Formula: see text] as measured with MBM and MSM, respectively. Corresponding one-year postoperative values were 1,238.3 [Formula: see text] 118.7 [Formula: see text] and 1,250.1 [Formula: see text] 117.5 [Formula: see text]. The MBM allowed ICV determination from one-week postoperative datasets. Measurement time with MBM was 4 CONCLUSIONS: MBM is an efficient method for determining the ICV of craniosynostosis patients, allowing the measurement of skulls with bony defects. The repeatability and short measurement time of MBM are attributable to the user interference and assessment of the measurement process.
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Affiliation(s)
- Antti G Ritvanen
- Department of Electronics, School of Electrical Engineering, Aalto University, Otakaari 7B, 02150 , Espoo, Finland,
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Ertekin T, Acer N, Içer S, Ilıca AT. Comparison of two methods for the estimation of subcortical volume and asymmetry using magnetic resonance imaging: a methodological study. Surg Radiol Anat 2012; 35:301-9. [DOI: 10.1007/s00276-012-1036-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Accepted: 10/25/2012] [Indexed: 01/18/2023]
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Shearer BM, Sholts SB, Garvin HM, Wärmländer SK. Sexual dimorphism in human browridge volume measured from 3D models of dry crania: A new digital morphometrics approach. Forensic Sci Int 2012; 222:400.e1-5. [DOI: 10.1016/j.forsciint.2012.06.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2010] [Revised: 05/07/2012] [Accepted: 06/11/2012] [Indexed: 10/28/2022]
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Volumetric analysis of the mandibular condyle using cone beam computed tomography. Eur J Radiol 2012; 81:1812-6. [DOI: 10.1016/j.ejrad.2011.04.070] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Accepted: 04/04/2011] [Indexed: 11/19/2022]
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Acer N, Ilıca AT, Turgut AT, Ozçelik O, Yıldırım B, Turgut M. Comparison of three methods for the estimation of pineal gland volume using magnetic resonance imaging. ScientificWorldJournal 2012; 2012:123412. [PMID: 22619577 PMCID: PMC3349090 DOI: 10.1100/2012/123412] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Accepted: 11/29/2011] [Indexed: 11/17/2022] Open
Abstract
Pineal gland is a very important neuroendocrine organ with many physiological functions such as regulating circadian rhythm. Radiologically, the pineal gland volume is clinically important because it is usually difficult to distinguish small pineal tumors via magnetic resonance imaging (MRI). Although many studies have estimated the pineal gland volume using different techniques, to the best of our knowledge, there has so far been no stereological work done on this subject. The objective of the current paper was to determine the pineal gland volume using stereological methods and by the region of interest (ROI) on MRI. In this paper, the pineal gland volumes were calculated in a total of 62 subjects (36 females, 26 males) who were free of any pineal lesions or tumors. The mean ± SD pineal gland volumes of the point-counting, planimetry, and ROI groups were 99.55 ± 51.34, 102.69 ± 40.39, and 104.33 ± 40.45 mm3, respectively. No significant difference was found among the methods of calculating pineal gland volume (P > 0.05). From these results, it can be concluded that each technique is an unbiased, efficient, and reliable method, ideally suitable for in vivo examination of MRI data for pineal gland volume estimation.
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Affiliation(s)
- Niyazi Acer
- Department of Anatomy, School of Medicine, Erciyes University Kayseri, Turkey.
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Nisari M, Ertekin T, Ozçelik O, Cınar S, Doğanay S, Acer N. Stereological evaluation of the volume and volume fraction of newborns' brain compartment and brain in magnetic resonance images. Surg Radiol Anat 2012; 34:825-32. [PMID: 22526169 DOI: 10.1007/s00276-012-0971-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 03/28/2012] [Indexed: 11/26/2022]
Abstract
PURPOSE Brain development in early life is thought to be critical period in neurodevelopmental disorder. Knowledge relating to this period is currently quite limited. This study aimed to evaluate the volume relation of total brain (TB), cerebrum, cerebellum and bulbus+pons by the use of Archimedes' principle and stereological (point-counting) method and after that to compare these approaches with each other in newborns. METHODS This study was carried out on five newborn cadavers mean weighing 2.220 ± 1.056 g with no signs of neuropathology. The mean (±SD) age of the subjects was 39.7 (±1.5) weeks. The volume and volume fraction of the total brain, cerebrum, cerebellum and bulbus+pons were determined on magnetic resonance (MR) images using the point-counting approach of stereological methods and by the use of fluid displacement technique. RESULTS The mean (±SD) TB, cerebrum, cerebellum and bulbus+pons volumes by fluid displacement were 271.48 ± 78.3, 256.6 ± 71.8, 12.16 ± 6.1 and 2.72 ± 1.6 cm3, respectively. By the Cavalieri principle (point-counting) using sagittal MRIs, they were 262.01 ± 74.9, 248.11 ± 68.03, 11.68 ± 6.1 and 2.21 ± 1.13 cm3, respectively. The mean (± SD) volumes by point-counting technique using axial MR images were 288.06 ± 88.5, 275.2 ± 83.1, 19.75 ± 5.3 and 2.11 ± 0.7 cm3, respectively. There were no differences between the fluid displacement and point-counting (using axial and sagittal images) for all structures (p > 0.05). CONCLUSION This study presents the basic data for studies relative to newborn's brain volume fractions according to two methods. Stereological (point-counting) estimation may be accepted a beneficial and new tool for neurological evaluation in vivo research of the brain. Based on these techniques we introduce here, the clinician may evaluate the growth of the brain in a more efficient and precise manner.
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Affiliation(s)
- Mehtap Nisari
- Department of Anatomy, School of Medicine, University of Erciyes, Kayseri, 38039, Turkey.
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Kayipmaz S, Sezgin OS, Saricaoglu ST, Bas O, Sahin B, Küçük M. The estimation of the volume of sheep mandibular defects using cone-beam computed tomography images and a stereological method. Dentomaxillofac Radiol 2011; 40:165-9. [PMID: 21346083 DOI: 10.1259/dmfr/23067462] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The Cavalieri principle of stereological methods is widely used to estimate the volume of structures. Recently in clinical practice, it has become common to use this approach for daily routine purposes. The Cavalieri principle provides quantitative and unbiased volume estimates which are independent of the observer. In the present study, the efficacy of using the Cavalieri principle to estimate the volume of sheep mandibular defects on cone beam CT (CBCT) scans was tested. METHODS 24 differently sized defects were created on 4 sheep mandibles. Before the defects were created, the outer boundaries of the defects were determined using plaster casts. CBCT scans of the defects were taken. The scans were reconstructed in the coronal plane and sections of 0.2 mm thickness with 0.2 mm and 0.4 mm intervals were obtained. The volume of each defect was estimated using the Cavalieri principle. The models were created using light-body silicone for the estimation of the actual volume of each defect. They were immersed in water using a pycnometer and the actual volumes were obtained on the basis of the Archimedean principle. The actual and estimated volumes of the defects were compared using the Wilcoxon signed-rank test. RESULTS The results showed that the volumes from the Cavalieri estimates did not differ from the actual volumes of the defects (P > 0.05). CONCLUSION We concluded that the volume of mandibular defects can be accurately estimated using the Cavalieri principle on images from a CBCT scan.
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Affiliation(s)
- S Kayipmaz
- Karadeniz Technical University Faculty of Dentistry, Department of Oral Diagnosis and Radiology, 61080 Trabzon,Turkiye.
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Ertekin T, Acer N, Turgut AT, Aycan K, Ozçelik O, Turgut M. Comparison of three methods for the estimation of the pituitary gland volume using magnetic resonance imaging: a stereological study. Pituitary 2011; 14:31-8. [PMID: 20809112 DOI: 10.1007/s11102-010-0254-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Stereological techniques using point counting and planimetry have been used to estimate pituitary gland volume. However, many studies have estimated pituitary gland volume by the mathematical approach the elliptic formula. The objective of the current study was to determine pituitary gland volume using stereological methods and elliptic formula on magnetic resonance imaging (MRI). In this study, pituitary gland volumes were estimated in a total of 28 subjects (22 females, 6 males,) who were free of any pituitary or neurological symptoms and signs. The mean ± SD pituitary gland volumes for the point counting, planimetry and elliptic formulae groups were 582.14 ± 140.16 mm³, 610.08 ± 133.17 mm³, and 432.82 ± 147.38 mm³, respectively. The mean CE for the pituitary gland volume estimates derived from the point counting technique was 8.07%. No significant difference was found between point counting and planimetric methods for the pituitary gland volume (P > 0.05). In addition, there was a 26.14 and 29.71% underestimation of pituitary volume as measured by the elliptic formula compared to the point counting and planimetric techniques, respectively. From these results, it can be concluded that stereological techniques are unbiased, efficient and reliable methods and are ideally suitable for in vivo examination of MRI data for pituitary gland volume estimation. Hence, we suggest that estimating pituitary gland volume using MRI study and stereology may be clinically relevant for pituitary surgeons for the investigation of the structure and function of the pituitary gland.
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Affiliation(s)
- Tolga Ertekin
- Department of Anatomy, Erciyes University School of Medicine, Kayseri, Turkey.
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Reconstruction of the late Pleistocene human skull from Hofmeyr, South Africa. J Hum Evol 2010; 59:1-15. [DOI: 10.1016/j.jhevol.2010.02.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Revised: 11/16/2009] [Accepted: 12/23/2009] [Indexed: 11/23/2022]
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Sholts SB, Wärmländer SK, Flores LM, Miller KW, Walker PL. Variation in the Measurement of Cranial Volume and Surface Area Using 3D Laser Scanning Technology. J Forensic Sci 2010; 55:871-6. [DOI: 10.1111/j.1556-4029.2010.01380.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Comparison of two volumetric techniques for estimating volume of intracerebral ventricles using magnetic resonance imaging: a stereological study. Anat Sci Int 2010; 85:131-9. [DOI: 10.1007/s12565-009-0068-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2009] [Accepted: 11/13/2009] [Indexed: 11/27/2022]
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Henley SMD, Ridgway GR, Scahill RI, Klöppel S, Tabrizi SJ, Fox NC, Kassubek J. Pitfalls in the use of voxel-based morphometry as a biomarker: examples from huntington disease. AJNR Am J Neuroradiol 2009; 31:711-9. [PMID: 20037137 DOI: 10.3174/ajnr.a1939] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND AND PURPOSE VBM is increasingly used in the study of neurodegeneration, and recently there has been interest in its potential as a biomarker. However, although it is largely "automated," VBM is rarely implemented consistently across studies, and changing user-specified options can alter the results in a way similar to the very biologic differences under investigation. MATERIALS AND METHODS This work uses data from patients with HD to demonstrate the effects of several user-specified VBM parameters and analyses: type and level of statistical correction, modulation, smoothing kernel size, adjustment for brain size, subgroup analysis, and software version. RESULTS The results demonstrate that changing these options can alter results in a way similar to the biologic differences under investigation. CONCLUSIONS If VBM is to be useful clinically or considered for use as a biomarker, there is a need for greater recognition of these issues and more uniformity in its application for the method to be both reproducible and valid.
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Affiliation(s)
- S M D Henley
- Dementia Research Centre, Department of Neurodegenerative Disease, Institute of Neurology, University College London, United Kingdom
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Furtado SV, Reddy K, Hegde A. Posterior fossa morphometry in symptomatic pediatric and adult Chiari I malformation. J Clin Neurosci 2009; 16:1449-54. [DOI: 10.1016/j.jocn.2009.04.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Revised: 04/04/2009] [Accepted: 04/15/2009] [Indexed: 02/06/2023]
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Unbiased Estimation of the Eyeball Volume Using the Cavalieri Principle on Computed Tomography Images. J Craniofac Surg 2009; 20:233-7. [DOI: 10.1097/scs.0b013e3181843518] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Nooranipour M, Farahani RM. Estimation of cranial capacity and brain weight in 18–22-year-old Iranian adults. Clin Neurol Neurosurg 2008; 110:997-1002. [DOI: 10.1016/j.clineuro.2008.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2008] [Revised: 06/12/2008] [Accepted: 06/14/2008] [Indexed: 10/21/2022]
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Unbiased estimation of the calcaneus volume using the Cavalieri principle on computed tomography images. Ann Anat 2008; 190:452-60. [DOI: 10.1016/j.aanat.2008.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2007] [Revised: 06/06/2008] [Accepted: 06/27/2008] [Indexed: 11/20/2022]
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Sahin B, Mazonakis M, Akan H, Kaplan S, Bek Y. Dependence of computed tomography volume measurements upon section thickness: An application to human dry skulls. Clin Anat 2008; 21:479-85. [DOI: 10.1002/ca.20664] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ayyildiz M, Kozan R, Agar E, Kaplan S. Sexual dimorphism in the medial vestibular nucleus of adult rats: Stereological study. Anat Sci Int 2008; 83:131-9. [DOI: 10.1111/j.1447-073x.2007.00220.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ekinci N, Acer N, Akkaya A, Sankur Ş, Kabadayi T, Sahin B. Volumetric evaluation of the relations among the cerebrum, cerebellum and brain stem in young subjects: a combination of stereology and magnetic resonance imaging. Surg Radiol Anat 2008; 30:489-94. [DOI: 10.1007/s00276-008-0356-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2007] [Accepted: 04/25/2008] [Indexed: 11/30/2022]
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Acer N, Sahin B, Usanmaz M, Tatoğlu H, Irmak Z. Comparison of point counting and planimetry methods for the assessment of cerebellar volume in human using magnetic resonance imaging: a stereological study. Surg Radiol Anat 2008; 30:335-9. [DOI: 10.1007/s00276-008-0330-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2007] [Accepted: 02/11/2008] [Indexed: 11/27/2022]
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Altuğ ME, Serarslan Y, Bal R, Kontaş T, Ekici F, Melek IM, Aslan H, Duman T. Caffeic acid phenethyl ester protects rabbit brains against permanent focal ischemia by antioxidant action: a biochemical and planimetric study. Brain Res 2008; 1201:135-42. [PMID: 18308295 DOI: 10.1016/j.brainres.2008.01.053] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2007] [Revised: 01/15/2008] [Accepted: 01/15/2008] [Indexed: 12/14/2022]
Abstract
The present study was conducted to investigate whether caffeic acid phenethyl ester (CAPE), an active component of propolis extract, has a protective effect on brain injury after focal permanent cerebral ischemia, and to determine the possible antioxidant mechanisms. Cerebral infarction in adult male New Zealand rabbits was induced by microsurgical procedures producing right focal permanent middle cerebral artery occlusion (pMCAO). CAPE was administered to the treatment group after pMCAO at a dose of 10 micromol kg(-1) once a day intraperitoneally for 7 days. Neurological deficits were evaluated, using a modified six-point scale. Spectrophotometric assay was used to determine the contents of malondialdehyde (MDA), glutathione (GSH), catalase (CAT), nitric oxide (NO) and xanthine oxidase (XO). In the ipsilateral hemisphere, the infarct volume of the brain was assessed in brain slices stained with heamatoxylen and eosin. The results showed that treatment with CAPE significantly reduced the percentage of infarction in the ipsilateral hemisphere compared with the ischemia group. CAPE treatment significantly attenuated the elevation of plasma MDA, CAT and XO content (p<0.05), whereas it significantly increased the levels of plasma GSH and NO (p<0.05). Therefore, subacute CAPE administration plays a protective role in focal pMCAO due to attenuation of lipid peroxidation and its antioxidant activity. All of these findings suggest that CAPE provides neuroprotection against cerebral ischemia injury through its antioxidant action.
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Affiliation(s)
- Muhammed Enes Altuğ
- Department of Surgery, Mustafa Kemal University Faculty of Veterinary Medicine, Tayfur Sökmen Kampusu, TR-31040 Hatay, Turkey
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Sahin B, Acer N, Sonmez OF, Emirzeoglu M, Basaloglu H, Uzun A, Bilgic S. Comparison of four methods for the estimation of intracranial volume: a gold standard study. Clin Anat 2008; 20:766-73. [PMID: 17708568 DOI: 10.1002/ca.20520] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Investigators can infer how much reduction in volume has occurred since brain volume was at its peak, by combining measures of brain volume with measures of intracranial volume (ICV). Several methodologies have been proposed to asses the ICV. However, we have not seen a gold-standard study evaluating the results of the methodologies for the assessment of ICV. In the present study, the actual intracranial volume of 20 dry skulls was measured using the water-filling method, using this as a gold standard. Anthropometry, cephalometry, point-counting, and planimetry techniques were applied to the same skulls to estimate the ICV. Anthropometric and cephalometric measurements were carried out directly on skulls and roentgenograms, respectively. Consecutive computed tomography sections at a thickness of 10 mm were used to estimate the ICV of the skulls by means of the point-counting and planimetry methods. The mean (+/-SD) of the actual ICV measured by the water-filling method was 1,262.0 +/- 160.4 cm(3) (1,389.5 +/- 96.5 cm(3) for males and 1,134.5 +/- 94.3 cm(3) for females, respectively). Our results showed that the estimated values obtained by all four methods differed from the actual volumes of the skulls (P < 0.05). The data obtained by anthropometry resulted in overestimation. However, cephalometry, point-counting, and planimetry methods produced underestimation. After calibration, there were no significant differences between the actual volumes and the results of the four methods (P > 0.05). While the anthropometric method is easy and quick to apply, its result may deviate from the actual values. The optimized stereological techniques of point-counting and planimetry methods may provide unbiased ICV results since they take the third dimension of the structures into account.
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Affiliation(s)
- B Sahin
- Department of Anatomy, Medical School, Ondokuz Mayis University, Samsun, Turkey.
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