Article
Clinical Neurology
Zhen-Gui Xu, Jin-Jing Xu, Jinghua Hu, Yuanqing Wu, Dan Wang
Summary: This study investigated abnormal cerebral blood flow in tinnitus patients and the effects of headache on cerebral blood flow, finding decreased CBF in the auditory and prefrontal cortex of chronic tinnitus patients. Headache may accelerate CBF reductions in tinnitus, forming the neurological mechanism in chronic tinnitus with tension-type headache.
FRONTIERS IN NEUROLOGY
(2021)
Article
Neurosciences
Fang Ye, Lei Du, Bing Liu, Xinying Gao, Aocai Yang, Die Liu, Yue Chen, Kuan Lv, Pengfei Xu, Yuanmei Chen, Jing Liu, Lipeng Zhang, Shijun Li, Amir Shmuel, Qi Zhang, Guolin Ma
Summary: This study compared cerebral blood flow using pCASL perfusion imaging in individuals with autism spectrum disorders (ASD) and typically developing children. The results showed that individuals with ASD had reduced cerebral blood flow in certain brain regions, and there were correlations between cerebral blood flow and clinical characteristics/developmental profile.
FRONTIERS IN NEUROSCIENCE
(2022)
Article
Neurosciences
Qianling Zhou, Meng Li, Qisen Fan, Feng Chen, Guihua Jiang, Tianyue Wang, Qinmeng He, Shishun Fu, Yi Yin, Jinzhi Lin, Jianhao Yan
Summary: This study found altered cerebral blood flow patterns in patients with trigeminal neuralgia, particularly in regions associated with pain perception and modulation. The study also identified correlations between abnormal regional cerebral blood flow and clinical characteristics of trigeminal neuralgia. These findings suggest that non-invasive resting cerebral perfusion imaging can provide complementary information for understanding the neuropathological mechanism underlying trigeminal neuralgia.
FRONTIERS IN NEUROSCIENCE
(2022)
Review
Psychology, Developmental
Laust Knudsen, Abigail J. Sheldrick, Manouchehr S. Vafaee, Tanja Maria Michel
Summary: Cognition and brain homeostasis rely on cerebral blood flow for adequate oxygen and nutrient supply to the brain tissue. Altered cerebral blood flow has been observed in individuals with autism spectrum condition, suggesting it as a potential biomarker for autism. Technological advancements have made it possible to non-invasively measure cerebral blood flow using arterial spin labeling magnetic resonance imaging. However, most neuroimaging studies still rely on indirect measures from functional magnetic resonance imaging. This review explores the use of arterial spin labeling in studying the neurobiology of autism, comparing the results with molecular imaging and discussing its potential applications. We found consistent results between arterial spin labeling and molecular imaging, especially when considering age and sex. Arterial spin labeling also has other applications beyond measuring cerebral blood flow, such as evaluating functional connectivity. Researchers are encouraged to consider the application of arterial spin labeling in future studies to better understand the neurobiology of autism.
Article
Radiology, Nuclear Medicine & Medical Imaging
Xiaoyuan Fan, Zhentao Zuo, Tianye Lin, Zhichao Lai, Hui You, Jianxun Qu, Juan Wei, Bao Liu, Feng Feng
Summary: The study aimed to investigate whether preoperative arterial spin labeling (ASL) MRI can predict cerebral hyperperfusion after carotid endarterectomy (CEA) in patients with carotid stenosis. The study found that ASL can non-invasively predict cerebral hyperperfusion after CEA in patients with carotid stenosis based on the presence of arterial transit artifacts (ATAs).
EUROPEAN RADIOLOGY
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jun Liu, Juan Zhu, Yaxian Wang, Fei Wang, Hualin Yang, Nan Wang, Qingyun Chu, Qing Yang
Summary: This study demonstrates the value of arterial spin labeling (ASL) perfusion imaging in assessing the early efficacy of chemoradiotherapy for nasopharyngeal carcinoma (NPC). By investigating tumor blood flow parameters and their correlation with tumor atrophy rate, it is possible to predict the sensitivity to chemoradiotherapy and the presence of residual tumors.
INSIGHTS INTO IMAGING
(2022)
Article
Neurosciences
Meher R. Juttukonda, Binyin Li, Randa Almaktoum, Kimberly A. Stephens, Kathryn M. Yochim, Essa Yacoub, Randy L. Buckner, David H. Salat
Summary: ASL MRI data from HCP-A was used to study cerebral hemodynamics in typically aging adults, revealing that white matter CBF decreases and white matter ATT lengthens with age. Additionally, CBF is lower and ATTs are longer in white matter compared to gray matter across the adult lifespan. Furthermore, sex differences were observed with females showing shorter white matter ATTs than males.
Article
Radiology, Nuclear Medicine & Medical Imaging
Xinyu Wang, Weiqiang Dou, Dong Dong, Xinyi Wang, Xueyu Chen, Kunjian Chen, Huimin Mao, Yu Guo, Chao Zhang
Summary: This study aimed to explore the feasibility of three-dimensional pseudo-continuous arterial-spin-labeling (tASL) in evaluating MCA recanalization. After recanalization, tASL provided good prognosis and was found to be an independent predictor of good clinical outcome.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Ying Hu, Rongbo Liu, Fabao Gao
Summary: The study on 90 healthy adults found that the age-related perfusion patterns in most brain regions were best fitted by cubic models, and age-dependent CBF changes showed a nonlinear decreasing trend, with the rate of reduction slowing down with age.
KOREAN JOURNAL OF RADIOLOGY
(2021)
Article
Medicine, General & Internal
Tingting Zhang, Haijun Niu, Yawen Liu, Linkun Cai, Dong Liu, Erwei Zhao, Min Li, Wenjuan Liu, Jing Li, PengGang Qiao, Wei Zheng, Pengling Ren, Zhenchang Wang
Summary: This study investigated the effects of dobutamine on cerebral hemodynamics and found that dobutamine stress significantly decreased cerebral blood flow in the frontal lobe anterior circulation. Additionally, body mass index, resting systolic blood pressure, and basilar artery diameter were significantly associated with changes in frontal lobe cerebral blood flow.
Article
Clinical Neurology
Yuki Kitazaki, Masamichi Ikawa, Tadanori Hamano, Hirohito Sasaki, Tomohisa Yamaguchi, Soichi Enomoto, Norimichi Shirafuji, Kouji Hayashi, Osamu Yamamura, Tetsuya Tsujikawa, Hidehiko Okazawa, Hirohiko Kimura, Yasunari Nakamoto
Summary: This study aimed to evaluate the clinical utility of ASL perfusion imaging in the diagnosis of CJD. The results showed that CJD patients exhibited ASL hypoperfusion in lesions with DWI hyperintensity, suggesting the potential diagnostic aid of ASL-CBF in CJD.
FRONTIERS IN NEUROLOGY
(2023)
Article
Neurosciences
Xiaonan Wang, Di Wang, Xinyang Li, Wenqi Wang, Ping Gao, Baohui Lou, Josef Pfeuffer, Xianchang Zhang, Jinxia Zhu, Chunmei Li, Min Chen
Summary: This study demonstrates that the combined use of cerebral blood flow and T1-mapping techniques improves the diagnostic accuracy in discriminating patients with Alzheimer's disease from cognitively normal control subjects. T1-mapping has the potential to become a competitive technique for quantitatively measuring pathologic changes in the brain.
FRONTIERS IN NEUROSCIENCE
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Shiori Amemiya, Yusuke Watanabe, Naoyuki Takei, Tsuyoshi Ueyama, Satoru Miyawaki, Satoshi Koizumi, Seiji Kato, Hidemasa Takao, Osamu Abe, Nobuhito Saito
Summary: The study found that in severe steno-occlusive diseases, the Combo strategy using ATT correction can improve CBF measurement accuracy, and VS significantly enhances CBF measurement accuracy in standard protocol and in moyamoya patients for the Combo.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2022)
Article
Physiology
Sergio M. Solis-Barquero, Rebeca Echeverria-Chasco, Marta Calvo-Imirizaldu, Elena Cacho-Asenjo, Antonio Martinez-Simon, Marta Vidorreta, Pablo D. Dominguez, Reyes Garcia de Eulate, Miguel Fernandez-Martinez, Maria A. Fernandez-Seara
Summary: A PCASL sequence combined with background suppression and accelerated 3D RARE stack-of-spirals was used to evaluate cerebrovascular reactivity induced by breath-holding in healthy volunteers. The study found that elevated cerebral blood flow was observed in most regions under hypercapnia, with significantly higher values in gray matter compared to white matter.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Joseph G. Woods, Eric C. Wong, Emma C. Boyd, Divya S. Bolar
Summary: In this study, a novel pulse sequence called VESPA ASL is introduced that combines velocity-selective and pseudo-continuous ASL to simultaneously label different pools of arterial blood for robust cerebral blood flow (CBF) and arterial transit time (ATT) measurement. The results show that VESPA ASL accurately measures CBF in the presence of long ATTs, and ATTs < TI can also be measured. VESPA ASL offers important advantages over existing methods for noninvasive perfusion and transit time imaging in vascular diseases with delayed arterial transit.
MAGNETIC RESONANCE IN MEDICINE
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Julio Garcia, Hana Sheitt, Michael S. Bristow, Carmen Lydell, Andrew G. Howarth, Bobak Heydari, Frank S. Prato, Maria Drangova, Rebecca E. Thornhill, Pablo Nery, Stephen B. Wilton, Allan Skanes, James A. White
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2020)
Editorial Material
Cardiac & Cardiovascular Systems
Frank S. Prato, Gerald Wisenberg
JOURNAL OF NUCLEAR CARDIOLOGY
(2021)
Article
Multidisciplinary Sciences
Kobra Alizadeh, Qin Sun, Tabitha McGuire, Terry Thompson, Frank S. Prato, Jim Koropatnick, Neil Gelman, Donna E. Goldhawk
SCIENTIFIC REPORTS
(2020)
Article
Biochemical Research Methods
Daniel Milej, Marwan Shahid, Androu Abdalmalak, Ajay Rajaram, Mamadou Diop, Keith St Lawrence
BIOMEDICAL OPTICS EXPRESS
(2020)
Article
Radiology, Nuclear Medicine & Medical Imaging
Neil Cockburn, Jeffrey Corsaut, Michael S. Kovacs, Keith St. Lawrence, Justin W. Hicks
NUCLEAR MEDICINE COMMUNICATIONS
(2020)
Article
Neurosciences
Ajay Rajaram, Lawrence C. M. Yip, Daniel Milej, Marianne Suwalski, Matthew Kewin, Marcus Lo, Jeffrey J. L. Carson, Victor Han, Soume Bhattacharya, Mamadou Diop, Sandrine de Ribaupierre, Keith St Lawrence
Article
Cardiac & Cardiovascular Systems
B. Wilk, H. Smailovic, G. Wisenberg, J. Sykes, J. Butler, M. Kovacs, J. D. Thiessen, F. S. Prato
Summary: Following myocardial infarction, there is a significant increase in extracellular volume (ECV) in remote myocardium on day 14 and day 21, potentially due to an ongoing inflammatory process in the early weeks post-infarct.
JOURNAL OF NUCLEAR CARDIOLOGY
(2022)
Article
Cardiac & Cardiovascular Systems
H. Smailovic, B. Wilk, G. Wisenberg, J. Sykes, J. Butler, J. Hicks, J. D. Thiessen, F. S. Prato
Summary: The study found that using heparin to suppress myocardial uptake of [F-18]FDG did not alter the determination of myocardial ECV, and the choice of infusion protocol also had no effect on the calculated ECV.
JOURNAL OF NUCLEAR CARDIOLOGY
(2022)
Article
Engineering, Biomedical
Lucas Narciso, Tracy Ssali, Hidehiro Iida, Keith St Lawrence
Summary: A non-invasive reference-based technique for imaging CMRO2 has been developed for PET/MRI, aiming to simplify the procedure without the need for invasive blood sampling. The approach utilizes whole-brain measurements of oxygen extraction fraction and cerebral blood flow to calibrate PET data, showing promising results in producing quantitative CMRO2 images. The study demonstrates the feasibility of this approach in quantifying CMRO2 without invasive procedures.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Oncology
Matthew Mouawad, Owen Lailey, Per Poulsen, Melissa O'Neil, Muriel Brackstone, Michael Lock, Brian Yaremko, Olga Shmuilovich, Anat Kornecki, Ilanit Ben Nachum, Giulio Muscedere, Kalan Lynn, Scott Karnas, Frank S. Prato, R. Terry Thompson, Stewart Gaede
Summary: In this study, intra-fraction tumor motion in early stage breast cancer patients receiving neoadjuvant stereotactic ablative radiotherapy was quantified using implanted fiducial markers and image guidance. Results suggest that a 5 mm PTV margin is sufficient for most patients, especially in the inferior/superior and anterior/posterior directions, but further immobilization or a larger margin may be necessary for the left/right direction.
RADIOTHERAPY AND ONCOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Adam Farag, R. Terry Thompson, Jonathan D. Thiessen, Frank S. Prato, Jean Theberge
Summary: This study introduces a transmission-based technique for generating hardware attenuation correction maps in PET/MRI systems, which can provide more accurate measurements of radioactivity. Compared to CT-based methods, TX-based maps are more effective in correcting cardiac PET images.
Article
Clinical Neurology
Stefan E. Poirier, Benjamin Y. M. Kwan, Michael T. Jurkiewicz, Lina Samargandy, Maryssa Iacobelli, David A. Steven, Victor Lam Shin Cheung, Gerald Moran, Frank S. Prato, R. Terry Thompson, Jorge G. Burneo, Udunna C. Anazodo, Jonathan D. Thiessen
Summary: This study demonstrates that PET/MRI with optimal MRAC can achieve similar diagnostic performance as PET/CT in drug-resistant epilepsy, suggesting the potential value of PET/MRI in clinical practice for epilepsy imaging.
Article
Radiology, Nuclear Medicine & Medical Imaging
Lucas Narciso, Tracy Ssali, Linshan Liu, Heather Biernaski, John Butler, Laura Morrison, Jennifer Hadway, Jeffrey Corsaut, Justin W. Hicks, Michael C. Langham, Felix W. Wehrli, Hidehiro Iida, Keith St Lawrence
Summary: A noninvasive PET/MRI technique for imaging cerebral metabolic rate of oxygen (CMRO2) was proposed and validated in an animal study. The technique uses functional MRI to calibrate PET data, potentially reducing the complexity of PET imaging. The results showed good agreement between regional CMRO2 measurements from the new technique and traditional PET-alone measurements.
JOURNAL OF NUCLEAR MEDICINE
(2021)
Article
Neuroimaging
Tracy Ssali, Lucas Narciso, Justin Hicks, Linshan Liu, Sarah Jesso, Lauryn Richardson, Matthias Gunther, Simon Konstandin, Klaus Eickel, Frank Prato, Udunna C. Anazodo, Elizabeth Finger, Keith St Lawrence
Summary: This study evaluated the similarity between ASL and PET in diagnosing FTD, and the results showed that ASL has the potential to be a cost-effective alternative.
NEUROIMAGE-CLINICAL
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Benjamin Wilk, Haris Smailovic, Rebecca Sullivan, Erik R. Sistermans, John Butler, Hannah Jago, Michael Kovacs, Gerald Wisenberg, Jonathan D. Thiessen, Frank S. Prato
Summary: This study suggests that glucose suppression through heparin injection and lipid infusion can decrease the metabolic rate of glucose in infarcted tissue of myocardial infarction patients. Additionally, an increase in fibrosis and inflammatory cells was found in the center of the infarct.