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Physically implausible signals as a quantitative quality assessment metric in prostate diffusion-weighted MR imaging. Abdom Radiol (NY) 2022; 47:2500-2508. [PMID: 35583823 DOI: 10.1007/s00261-022-03542-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 04/20/2022] [Accepted: 04/26/2022] [Indexed: 11/01/2022]
Abstract
PURPOSE To provide a quantitative assessment of diffusion-weighted MR images of the prostate through identification of PIDS which clearly represents artifacts in the data. We calculated the percentage and distribution of PIDS in prostate DWI and compare the amount of PIDS between mpMRI images obtained with and without an endorectal coil. METHODS This IRB approved retrospective study (from 03/03/2014 to 03/10/2020), included 40 patients scanned with endorectal coil (ERC) and 40 without ER coil (NERC). PIDS contains any voxel where: (1) the diffusion signal increases despite an increase in b-value; and/or (2) apparent diffusion coefficient (ADC) is more than 3.0 μm2/ms (the ADC of pure water at 37 °C and it is physically implausible for any material to have a higher ADC). PIDS for transition zone (TZ) and peripheral zone (PZ) was calculated using an in-house MATLAB program. DWI images were quantitatively inspected for noise, motion, and distortion. T-test was used to compare the difference between PIDS levels in ERC versus NERC and ANOVA to compare the PIDS levels in the anatomic zones. The images were evaluated by a fellowship-trained radiologist in Abdominal Imaging with more than 10 years of experience in reading prostate MRI. This was tested only in prostate in this study. RESULTS 80 patients (58 ± 8 years old, 80 men) were evaluated. The percentage of voxels exhibiting PIDS was 17.1 ± 8.1% for the ERC cohort and 22.2 ± 15.5% for the NERC cohort. PIDS for NERC versus ERC were not significantly different (p = 0.14). The apex and base showed similar percentages of PIDS in ERC (p = 0.30) and NERC (p = 0.86). The mid (13.8 ± 8.6%) in ERC showed lower values (p = 0.02) of PIDS compared to apex (19.9 ± 11.1%) and base (17.5 ± 8.3%). CONCLUSION PIDS maps provide a spatially resolved quantitative quality assessment for prostate DWI. Average PIDS over the entire prostate were similar for the ERC and NERC cohorts, and did not differ significantly across prostate zones. However, for many of the patients, PIDS was focally much higher in specific prostate zones. PIDS assessment can guide Radiologist's evaluation of images and the development of improved DWI sequences.
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White T, Jansen PR, Muetzel RL, Sudre G, El Marroun H, Tiemeier H, Qiu A, Shaw P, Michael AM, Verhulst FC. Automated quality assessment of structural magnetic resonance images in children: Comparison with visual inspection and surface-based reconstruction. Hum Brain Mapp 2017; 39:1218-1231. [PMID: 29206318 DOI: 10.1002/hbm.23911] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 11/22/2017] [Accepted: 11/29/2017] [Indexed: 01/26/2023] Open
Abstract
Motion-related artifacts are one of the major challenges associated with pediatric neuroimaging. Recent studies have shown a relationship between visual quality ratings of T1 images and cortical reconstruction measures. Automated algorithms offer more precision in quantifying movement-related artifacts compared to visual inspection. Thus, the goal of this study was to test three different automated quality assessment algorithms for structural MRI scans. The three algorithms included a Fourier-, integral-, and a gradient-based approach which were run on raw T1 -weighted imaging data collected from four different scanners. The four cohorts included a total of 6,662 MRI scans from two waves of the Generation R Study, the NIH NHGRI Study, and the GUSTO Study. Using receiver operating characteristics with visually inspected quality ratings of the T1 images, the area under the curve (AUC) for the gradient algorithm, which performed better than either the integral or Fourier approaches, was 0.95, 0.88, and 0.82 for the Generation R, NHGRI, and GUSTO studies, respectively. For scans of poor initial quality, repeating the scan often resulted in a better quality second image. Finally, we found that even minor differences in automated quality measurements were associated with FreeSurfer derived measures of cortical thickness and surface area, even in scans that were rated as good quality. Our findings suggest that the inclusion of automated quality assessment measures can augment visual inspection and may find use as a covariate in analyses or to identify thresholds to exclude poor quality data.
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Affiliation(s)
- Tonya White
- Department of Child and Adolescent Psychiatry, Erasmus University Medical Centre, Rotterdam, Netherlands.,Department of Radiology, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Philip R Jansen
- Department of Child and Adolescent Psychiatry, Erasmus University Medical Centre, Rotterdam, Netherlands.,Department of Radiology, Erasmus University Medical Centre, Rotterdam, Netherlands.,The Generation R Study Group, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Ryan L Muetzel
- Department of Child and Adolescent Psychiatry, Erasmus University Medical Centre, Rotterdam, Netherlands.,The Generation R Study Group, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Gustavo Sudre
- The Neurobehavioral Clinical Research Section, Social and Behavioral Research Branch, National Human Genome Research Institute, NIH, Bethesda, Maryland
| | - Hanan El Marroun
- Department of Child and Adolescent Psychiatry, Erasmus University Medical Centre, Rotterdam, Netherlands.,The Generation R Study Group, Erasmus University Medical Centre, Rotterdam, Netherlands.,Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Henning Tiemeier
- Department of Child and Adolescent Psychiatry, Erasmus University Medical Centre, Rotterdam, Netherlands.,Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands.,Department of Epidemiology, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Anqi Qiu
- Department of Biomedical Engineering and Clinical Imaging Research Center, National University of Singapore, Singapore, Singapore.,Singapore Institute for Clinical Sciences, Singapore, Singapore
| | - Philip Shaw
- The Neurobehavioral Clinical Research Section, Social and Behavioral Research Branch, National Human Genome Research Institute, NIH, Bethesda, Maryland
| | - Andrew M Michael
- Autism and Developmental Medicine Institute, Geisinger Health System, Lewisburg, Pennsylvania, 17837
| | - Frank C Verhulst
- Department of Child and Adolescent Psychiatry, Erasmus University Medical Centre, Rotterdam, Netherlands.,Department of Clinical Medicine at the Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Kim SS, Ko SM, Choi SI, Choi BH, Stillman AE. Sudden cardiac death from structural heart diseases in adults: imaging findings with cardiovascular computed tomography and magnetic resonance. Int J Cardiovasc Imaging 2016; 32 Suppl 1:21-43. [PMID: 27139460 DOI: 10.1007/s10554-016-0891-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 04/05/2016] [Indexed: 02/07/2023]
Abstract
Sudden cardiac death (SCD) is defined as the unexpected natural death from a cardiac cause within an hour of the onset of symptoms in the absence of any other cause. Although such a rapid course of death is mainly attributed to a cardiac arrhythmia, identification of structural heart disease by cardiovascular computed tomography (CCT) and cardiovascular magnetic resonance (CMR) imaging is important to predict the long-term risk of SCD. In adults, SCD most commonly results from coronary artery diseases, coronary artery anomalies, inherited cardiomyopathies, valvular heart diseases, myocarditis, and aortic dissection with coronary artery involvement or acute aortic regurgitation. This review describes the CCT and CMR findings of structural heart diseases related to SCD, which are essential for radiologists to diagnose or predict.
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Affiliation(s)
- Song Soo Kim
- Department of Radiology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, South Korea
| | - Sung Min Ko
- Department of Radiology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South Korea.
| | - Sang Il Choi
- Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, South Korea
| | - Bo Hwa Choi
- Department of Radiology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South Korea
| | - Arthur E Stillman
- Department of Radiology, Division of Cardiothoracic Imaging, Emory University Hospital, Atlanta, GA, USA
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Gallego P. [Magnetic resonance imaging in the assessment of valvular heart disease]. Rev Esp Cardiol 2011; 64 Suppl 2:10-8. [PMID: 21807283 DOI: 10.1016/j.recesp.2011.01.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Accepted: 01/23/2011] [Indexed: 10/17/2022]
Abstract
Although Doppler echocardiography remains the most frequently used imaging modality for assessing valvular heart disease, the technique has a number of limitations that could affect the quality of imaging studies and make the results difficult to interpret. Cardiac magnetic resonance (CMR) imaging could be superior to echocardiography in a number of ways: for example, for assessing ventricular dimensions, volumes, function and mass, for quantifying valvular regurgitation, and for investigating areas of myocardial fibrosis and extracardiac structures. In carrying out these tasks, CMR uses a variety of pulse sequences that are specially created to obtain information on specific tissue characteristics or on particular aspects of blood flow through heart valves. This general review article focuses on the usefulness of CMR in the clinical diagnosis of valvular heart disease and reviews how the data acquired using the technique can be incorporated into algorithms for the clinical management of patients with significant valvular heart lesions.
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Affiliation(s)
- Pastora Gallego
- Unidad de Técnicas Diagnósticas de Imagen, Servicio de Cardiología, Hospital Universitario Virgen Macarena, Sevilla, España.
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Mortamet B, Bernstein MA, Jack CR, Gunter JL, Ward C, Britson PJ, Meuli R, Thiran JP, Krueger G. Automatic quality assessment in structural brain magnetic resonance imaging. Magn Reson Med 2009; 62:365-72. [PMID: 19526493 DOI: 10.1002/mrm.21992] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
MRI has evolved into an important diagnostic technique in medical imaging. However, reliability of the derived diagnosis can be degraded by artifacts, which challenge both radiologists and automatic computer-aided diagnosis. This work proposes a fully-automatic method for measuring image quality of three-dimensional (3D) structural MRI. Quality measures are derived by analyzing the air background of magnitude images and are capable of detecting image degradation from several sources, including bulk motion, residual magnetization from incomplete spoiling, blurring, and ghosting. The method has been validated on 749 3D T(1)-weighted 1.5T and 3T head scans acquired at 36 Alzheimer's Disease Neuroimaging Initiative (ADNI) study sites operating with various software and hardware combinations. Results are compared against qualitative grades assigned by the ADNI quality control center (taken as the reference standard). The derived quality indices are independent of the MRI system used and agree with the reference standard quality ratings with high sensitivity and specificity (>85%). The proposed procedures for quality assessment could be of great value for both research and routine clinical imaging. It could greatly improve workflow through its ability to rule out the need for a repeat scan while the patient is still in the magnet bore.
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Affiliation(s)
- Bénédicte Mortamet
- Advanced Clinical Imaging Technology, Siemens Suisse SA, Healthcare Sector IM&WS-Centre d'Imagerie Biomédicale (CIBM), Lausanne, Switzerland.
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Affiliation(s)
- Peter J. Cawley
- From the Division of Cardiology (P.J.C., C.M.O.), Department of Medicine, and Department of Radiology (J.H.M.), University of Washington, Seattle, Wash
| | - Jeffrey H. Maki
- From the Division of Cardiology (P.J.C., C.M.O.), Department of Medicine, and Department of Radiology (J.H.M.), University of Washington, Seattle, Wash
| | - Catherine M. Otto
- From the Division of Cardiology (P.J.C., C.M.O.), Department of Medicine, and Department of Radiology (J.H.M.), University of Washington, Seattle, Wash
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Kim HW, Crowley AL, Kim RJ. A clinical cardiovascular magnetic resonance service: operational considerations and the basic examination. Cardiol Clin 2007; 25:1-13, v. [PMID: 17478237 DOI: 10.1016/j.ccl.2007.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Cardiovascular magnetic resonance (CMR) is now considered the "gold standard" for the assessment of regional and global systolic function, myocardial infarction and viability, and congenital heart disease. At specialized centers, CMR has become a clinical workhorse for the evaluation of ischemic heart disease and for heart failure and cardiomyopathies. Despite this versatility, general acceptance of CMR in cardiovascular medicine has progressed slowly. This article provides a basic understanding of important operational considerations when starting a CMR service and describes a conceptual framework of the components of a CMR examination.
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Affiliation(s)
- Han W Kim
- Duke Cardiovascular Magnetic Resonance Center, Duke University Medical Center, Box 3934, Durham, NC 27710, USA.
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