1
|
Hett K, McKnight CD, Leguizamon M, Lindsey JS, Eisma JJ, Elenberger J, Stark AJ, Song AK, Aumann M, Considine CM, Claassen DO, Donahue MJ. Deep learning segmentation of peri-sinus structures from structural magnetic resonance imaging: validation and normative ranges across the adult lifespan. Fluids Barriers CNS 2024; 21:15. [PMID: 38350930 PMCID: PMC10865560 DOI: 10.1186/s12987-024-00516-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 01/26/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND Peri-sinus structures such as arachnoid granulations (AG) and the parasagittal dural (PSD) space have gained much recent attention as sites of cerebral spinal fluid (CSF) egress and neuroimmune surveillance. Neurofluid circulation dysfunction may manifest as morphological changes in these structures, however, automated quantification of these structures is not possible and rather characterization often requires exogenous contrast agents and manual delineation. METHODS We propose a deep learning architecture to automatically delineate the peri-sinus space (e.g., PSD and intravenous AG structures) using two cascaded 3D fully convolutional neural networks applied to submillimeter 3D T2-weighted non-contrasted MRI images, which can be routinely acquired on all major MRI scanner vendors. The method was evaluated through comparison with gold-standard manual tracing from a neuroradiologist (n = 80; age range = 11-83 years) and subsequently applied in healthy participants (n = 1,872; age range = 5-100 years), using data from the Human Connectome Project, to provide exemplar metrics across the lifespan. Dice-Sørensen and a generalized linear model was used to assess PSD and AG changes across the human lifespan using quadratic restricted splines, incorporating age and sex as covariates. RESULTS Findings demonstrate that the PSD and AG volumes can be segmented using T2-weighted MRI with a Dice-Sørensen coefficient and accuracy of 80.7 and 74.6, respectively. Across the lifespan, we observed that total PSD volume increases with age with a linear interaction of gender and age equal to 0.9 cm3 per year (p < 0.001). Similar trends were observed in the frontal and parietal, but not occipital, PSD. An increase in AG volume was observed in the third to sixth decades of life, with a linear effect of age equal to 0.64 mm3 per year (p < 0.001) for total AG volume and 0.54 mm3 (p < 0.001) for maximum AG volume. CONCLUSIONS A tool that can be applied to quantify PSD and AG volumes from commonly acquired T2-weighted MRI scans is reported and exemplar volumetric ranges of these structures are provided, which should provide an exemplar for studies of neurofluid circulation dysfunction. Software and training data are made freely available online ( https://github.com/hettk/spesis ).
Collapse
Affiliation(s)
- Kilian Hett
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Colin D McKnight
- Dept. of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Melanie Leguizamon
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jennifer S Lindsey
- Dept. of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jarrod J Eisma
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jason Elenberger
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Adam J Stark
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Alexander K Song
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Megan Aumann
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Ciaran M Considine
- Dept. of Psychiatry and Behavioral Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Daniel O Claassen
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Manus J Donahue
- Dept. of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA.
- Dept. of Psychiatry and Behavioral Sciences, Vanderbilt University Medical Center, Nashville, TN, USA.
- Dept. of Electrical and Computer Engineering, Vanderbilt University, Nashville, TN, USA.
| |
Collapse
|
2
|
Song AK, Hay KR, Trujillo P, Aumann M, Stark AJ, Yan Y, Kang H, Donahue MJ, Zald DH, Claassen DO. Amphetamine-induced dopamine release and impulsivity in Parkinson's disease. Brain 2022; 145:3488-3499. [PMID: 34951464 DOI: 10.1093/brain/awab487] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 11/23/2021] [Accepted: 11/30/2021] [Indexed: 11/12/2022] Open
Abstract
Impulsive-compulsive behaviours manifest in a substantial proportion of subjects with Parkinson's disease. Reduced ventral striatum dopamine receptor availability, and increased dopamine release is noted in patients with these symptoms. Prior studies of impulsivity suggest that midbrain D2 autoreceptors regulate striatal dopamine release in a feedback inhibitory manner, and in healthy populations, greater impulsivity is linked to poor proficiency of this inhibition. This has not been assessed in a Parkinson's disease population. Here, we applied 18F-fallypride PET studies to assess striatal and extrastriatal D2-like receptor uptake in a placebo-controlled oral dextroamphetamine sequence. We hypothesized that Parkinson's disease patients with impulsive-compulsive behaviours would have greater ventral striatal dopaminergic response to dextroamphetamine, and that an inability to attenuate ventral striatal dopamine release via midbrain D2 autoreceptors would underlie this response. Twenty patients with Parkinson's disease (mean age = 64.1 ± 5.8 years) both with (n = 10) and without (n = 10) impulsive-compulsive behaviours, participated in a single-blind dextroamphetamine challenge (oral; 0.43 mg/kg) in an OFF dopamine state. All completed PET imaging with 18F-fallypride, a high-affinity D2-like receptor ligand, in the placebo and dextroamphetamine state. Both voxelwise and region of interest analyses revealed dextroamphetamine-induced endogenous dopamine release localized to the ventral striatum, and the caudal-medial orbitofrontal cortex. The endogenous dopamine release observed in the ventral striatum correlated positively with patient-reported participation in reward-based behaviours, as quantified by the self-reported Questionnaire for Impulsivity in Parkinson's disease Rating Scale. In participants without impulsive-compulsive behaviours, baseline midbrain D2 receptor availability negatively correlated with ventral striatal dopamine release; however, this relationship was absent in those with impulsive-compulsive behaviours. These findings emphasize that reward-based behaviours in Parkinson's disease are regulated by ventral striatal dopamine release, and suggest that loss of inhibitory feedback from midbrain autoreceptors may underlie the manifestation of impulsive-compulsive behaviours.
Collapse
Affiliation(s)
- Alexander K Song
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Kaitlyn R Hay
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Paula Trujillo
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Megan Aumann
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Vanderbilt Brain Institute, Department of Psychology, Vanderbilt University, Nashville, TN 37232, USA
| | - Adam J Stark
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Yan Yan
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Hakmook Kang
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Center for Quantitative Sciences, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Manus J Donahue
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - David H Zald
- Department of Psychology, Vanderbilt University, Nashville, TN 37240, USA.,Department of Psychiatry, Rutgers University, Piscataway, NJ 08854, USA
| | - Daniel O Claassen
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| |
Collapse
|
3
|
Hett K, Lyu I, Trujillo P, Lopez AM, Aumann M, Larson KE, Hedera P, Dawant B, Landman BA, Claassen DO, Oguz I. Anatomical texture patterns identify cerebellar distinctions between essential tremor and Parkinson's disease. Hum Brain Mapp 2021; 42:2322-2331. [PMID: 33755270 PMCID: PMC8090778 DOI: 10.1002/hbm.25331] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 11/25/2020] [Accepted: 12/16/2020] [Indexed: 01/15/2023] Open
Abstract
Voxel-based morphometry is an established technique to study focal structural brain differences in neurologic disease. More recently, texture-based analysis methods have enabled a pattern-based assessment of group differences, at the patch level rather than at the voxel level, allowing a more sensitive localization of structural differences between patient populations. In this study, we propose a texture-based approach to identify structural differences between the cerebellum of patients with Parkinson's disease (n = 280) and essential tremor (n = 109). We analyzed anatomical differences of the cerebellum among patients using two features: T1-weighted MRI intensity, and a texture-based similarity feature. Our results show anatomical differences between groups that are localized to the inferior part of the cerebellar cortex. Both the T1-weighted intensity and texture showed differences in lobules VIII and IX, vermis VIII and IX, and middle peduncle, but the texture analysis revealed additional differences in the dentate nucleus, lobules VI and VII, vermis VI and VII. This comparison emphasizes how T1-weighted intensity and texture-based methods can provide a complementary anatomical structure analysis. While texture-based similarity shows high sensitivity for gray matter differences, T1-weighted intensity shows sensitivity for the detection of white matter differences.
Collapse
Affiliation(s)
- Kilian Hett
- Department of Electrical Engineering and Computer ScienceVanderbilt UniversityNashvilleTennesseeUSA
| | - Ilwoo Lyu
- Department of Electrical Engineering and Computer ScienceVanderbilt UniversityNashvilleTennesseeUSA
| | - Paula Trujillo
- Department of NeurologyVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Alexander M. Lopez
- Department of NeurologyVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Megan Aumann
- Department of NeurologyVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Kathleen E. Larson
- Department of Electrical Engineering and Computer ScienceVanderbilt UniversityNashvilleTennesseeUSA
| | - Peter Hedera
- Department of NeurologyVanderbilt University Medical CenterNashvilleTennesseeUSA,Department of NeurologyUniversity of LouisvilleLouisvilleKentuckyUSA
| | - Benoit Dawant
- Department of Electrical Engineering and Computer ScienceVanderbilt UniversityNashvilleTennesseeUSA
| | - Bennett A. Landman
- Department of Electrical Engineering and Computer ScienceVanderbilt UniversityNashvilleTennesseeUSA
| | - Daniel O. Claassen
- Department of NeurologyVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Ipek Oguz
- Department of Electrical Engineering and Computer ScienceVanderbilt UniversityNashvilleTennesseeUSA
| |
Collapse
|
4
|
Trumel C, Gaillard E, Leynaud V, Aumann M, Braun JP. Comparison of the diagnostic accuracy of markers of the acute phase of inflammation in cats. A preliminary evaluation. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s00580-018-2886-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
5
|
Riesch J, Aumann M, Coenen J, Gietl H, Holzner G, Höschen T, Huber P, Li M, Linsmeier C, Neu R. Chemically deposited tungsten fibre-reinforced tungsten – The way to a mock-up for divertor applications. Nuclear Materials and Energy 2016. [DOI: 10.1016/j.nme.2016.03.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
6
|
Baladi MG, Koek W, Aumann M, Velasco F, France CP. Eating high fat chow enhances the locomotor-stimulating effects of cocaine in adolescent and adult female rats. Psychopharmacology (Berl) 2012; 222:447-57. [PMID: 22418731 DOI: 10.1007/s00213-012-2663-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Accepted: 02/06/2012] [Indexed: 12/24/2022]
Abstract
RATIONALE Dopamine systems vary through development in a manner that can impact drugs acting on those systems. Dietary factors can also impact the effects of drugs acting on dopamine systems. OBJECTIVES This study examined whether eating high fat chow alters locomotor effects of cocaine (1-56 mg/kg) in adolescent and adult female rats. METHODS Cocaine was studied in rats (n = 6/group) with free access to standard (5.7% fat) or high fat (34.3%) chow or restricted access to high fat chow (body weight matched to rats eating standard chow). RESULTS After 1 week of eating high fat chow (free or restricted access), sensitivity to cocaine was significantly increased in adolescent and adult rats, compared with rats eating standard chow. Sensitivity to cocaine was also increased in adolescent rats with restricted, but not free, access to high fat chow for 4 weeks. When adolescent and adult rats that previously ate high fat chow ate standard chow, sensitivity to cocaine returned to normal. In adolescent and adult female rats eating high fat chow, but not those eating standard chow, sensitivity to cocaine increased progressively over once weekly tests with cocaine (i.e., sensitization) in a manner that was not statistically different between adolescents and adults. CONCLUSIONS These results show that eating high fat chow alters sensitivity of female rats to acutely administered cocaine and also facilitates the development of sensitization to cocaine. That the type of food consumed can increase drug effects might have relevance to vulnerability to abuse cocaine in the female population.
Collapse
Affiliation(s)
- Michelle G Baladi
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229-3900, USA
| | | | | | | | | |
Collapse
|
7
|
Abstract
Uroperitoneum (UP) was diagnosed in 26 cats. Trauma was the most common cause (84.6%), including blunt abdominal trauma (59.1%), urethral catheterization (31.8%), and bladder expression (9.1%). The bladder was the most frequent site of urine leakage following blunt abdominal trauma (84.6%), while the urethra was the most common site following catheterization (71.4%). Common historical complaints were anuria (53.8%) and vomiting (50%). On physical examination, the bladders were palpable in nine (69%) of 13 cases; four of the nine had ruptured bladders. The ability to urinate did not exclude a diagnosis of UP since four noncatheterized cases reportedly urinated. Twenty-five cases were azotemic on presentation. The creatinine or potassium (K+) concentration in the serum compared to that in the peritoneal effusion (mean ratio, 1:2 and 1:1.9, respectively) was a useful indicator for UP. When performed, positive contrast radiography was diagnostic. Drainage of urine from the peritoneal cavity appeared to improve patient stabilization. Morbidity and mortality depended largely on the severity of associated injuries.
Collapse
Affiliation(s)
- M Aumann
- Veterinary Centers of America, Veterinary Referral Associates, Gaithersburg, Maryland 20878, USA
| | | | | |
Collapse
|