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https://www.readbyqxmd.com/read/28332854/the-intravoxel-incoherent-motion-mri-of-lateral-pterygoid-muscle-a-quantitative-analysis-in-patients-with-temporomandibular-joint-disorders
#1
Supak Ngamsom, Shin Nakamura, Junichiro Sakamoto, Shinya Kotaki, Akemi Tetsumura, Tohru Kurabayashi
OBJECTIVES: To quantitatively evaluate diffusion and perfusion status of lateral pterygoid muscle (LPM) in patients with temporomandibular joint disorder (TMD) by intravoxel incoherent motion (IVIM) imaging and to correlate with findings on temporomandibular joints (TMJs) by conventional MRI. METHODS: 42 patients with TMD underwent MRI. To assess IVIM parameters, diffusion-weighted imaging was obtained by spin-echo-based single-shot echoplanar imaging. Regions of interest were created on all diffusion-weighted images of the superior belly of the lateral pterygoid (SLP) and inferior belly of the lateral pterygoid (ILP) at b-values 0-500 s mm(-2)...
March 23, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28306208/evaluation-of-myocardial-microcirculation-using-intravoxel-incoherent-motion-imaging
#2
Anna Mou, Chen Zhang, Mengying Li, Fengqiang Jin, Qingwei Song, Ailian Liu, Zhiyong Li
PURPOSE: To explore whether cardiac magnetic resonance-intravoxel incoherent motion imaging (MR-IVIM) is feasible for the clinical evaluation of myocardial microcirculation. MATERIALS AND METHODS: The study included 30 patients (with hypertrophic cardiomyopathy, diabetes mellitus, hypertension, or combined diabetes and hypertension) and 34 healthy volunteers. MR-IVIM with a maximum gradient strength of 50 mT/m was performed on the left ventricular short axis (apex, middle, and base), using multiple b values (0-500 s/mm(2) ) on a 3...
March 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28283723/intravoxel-incoherent-motion-magnetic-resonance-imaging-of-the-knee-joint-in-children-with-juvenile-idiopathic-arthritis
#3
Fabian Hilbert, Annette Holl-Wieden, Alexander Sauer, Herbert Köstler, Henning Neubauer
BACKGROUND: MRI of synovitis relies on use of a gadolinium-based contrast agent. Diffusion-weighted MRI (DWI) visualises thickened synovium but is of limited use in the presence of joint effusion. OBJECTIVE: To investigate the feasibility and diagnostic accuracy of diffusion-weighted MRI with intravoxel incoherent motion (IVIM) for diagnosing synovitis in the knee joint of children with juvenile idiopathic arthritis. MATERIALS AND METHODS: Twelve consecutive children with confirmed or suspected juvenile idiopathic arthritis (10 girls, median age 11 years) underwent MRI with contrast-enhanced T1-weighted imaging and DWI at 1...
March 10, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28277457/advanced-mri-measures-of-cerebral-perfusion-and-their-clinical-applications
#4
Bryan Lanzman, Jeremy J Heit
Cerebral blood flow measurement by magnetic resonance imaging perfusion (MRP) techniques is broadly applied to patients with acute ischemic stroke, vasospasm following aneurysmal subarachnoid hemorrhage, chronic arterial steno-occlusive disease, cervical atherosclerotic disease, and primary brain neoplasms. MRP may be performed using an exogenous tracer, most commonly gadolinium-based intravenous contrast, or an endogenous tracer, such as arterial spin labeling (ASL) or intravoxel incoherent motion (IVIM). Here, we review the technical basis of commonly performed MRP techniques, the interpretation of MRP imaging maps, and how MRP provides valuable clinical information in the triage of patients with cerebral disease...
March 8, 2017: Topics in Magnetic Resonance Imaging: TMRI
https://www.readbyqxmd.com/read/28276105/adctotal-ratio-and-d-ratio-derived-from-intravoxel-incoherent-motion-early-after-tace-are-independent-predictors-for-survival-in-hepatocellular-carcinoma
#5
Lifang Wu, Pengju Xu, Shengxiang Rao, Li Yang, Caizhong Chen, Hao Liu, Caixia Fu, Mengsu Zeng
PURPOSE: To explore the threshold of intravoxel incoherent motion (IVIM) parameters, apparent diffusion coefficient [ADCtotal and ADC(0,500) ] ratios 24-48 hours after transarterial chemoembolization (TACE) to assess early response in patients with unresectable hepatocellular carcinoma (HCC) and to compare the association between diffusion-weighted imaging with the intravoxel incoherent motion (IVIM-DWI) and mRECIST with survival. MATERIALS AND METHODS: Institutional Review Board approval and informed consent were obtained for this prospective study...
March 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28275560/liver-intravoxel-incoherent-motion-ivim-magnetic-resonance-imaging-a-comprehensive-review-of-published-data-on-normal-values-and-applications-for-fibrosis-and-tumor-evaluation
#6
REVIEW
Yáo T Li, Jean-Pierre Cercueil, Jing Yuan, Weitian Chen, Romaric Loffroy, Yì Xiáng J Wáng
A comprehensive literature review was performed on liver intravoxel incoherent motion (IVIM) magnetic resonance imaging (MRI) technique and its applications. Heterogeneous data have been reported. IVIM parameters are magnetic field strength dependent to a mild extent. A lower Dslow (D) value at 3 T than at 1.5 T and higher perfusion fraction (PF) value at 3 T than at 1.5 T were noted. An increased number of b values are associated with increased IVIM parameter measurement accuracy. With the current status of art, IVIM technique is not yet capable of detecting early stage liver fibrosis and diagnosing liver fibrosis grades, nor can it differentiate liver tumors...
February 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28269992/volumetric-analysis-of-intravoxel-incoherent-motion-imaging-for-assessment-of-solitary-pulmonary-lesions
#7
Mei Yuan, Yan Zhong, Yu-Dong Zhang, Tong-Fu Yu, Hai Li, Jiang-Fen Wu
Background Differentiating between malignant and benign solitary pulmonary lesions (SPLs) is challenging. Purpose To determine diagnostic performance of intravoxel incoherent motion-based diffusion-weighted imaging (DW-IVIM) in distinguishing malignant from benign SPLs, using histogram analysis derived whole-tumor and single-section region of interest (ROI). Material and Methods This retrospective study received institutional review board approval. A total of 129 patients with diagnosed SPLs underwent DW-IVIM and apparent diffusion coefficient (ADC)...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28267238/ultrahigh-b-values-mri-in-normal-human-prostate-initial-research-on-reproducibility-and-age-related-differences
#8
Changzheng Shi, Dong Zhang, Zeyu Xiao, Li Wang, Rong Ma, Hanwei Chen, Liangping Luo
PURPOSE: To investigate the reproducibility of diffusion-weighted imaging (DWI) with ultrahigh b-values, and analyze the age-related differences in normal prostates. MATERIALS AND METHODS: In all, 67 healthy participants were divided into three age groups (group A, 15-30 years; group B, 31-50 years; group C, ≥51 years), and underwent DWI scanning twice with 15 b-factors from 0 to 3000 at 3.0T. Triexponential fits were applied to calculate the molecular diffusion coefficient (D), the pseudo-diffusion coefficient (D*), the ultrahigh apparent diffusion coefficient (ADCuh ), and perfusion fraction (f)...
March 7, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28265697/intravoxel-incoherent-motion-diffusion-weighted-magnetic-resonance-imaging-of-focal-vertebral-bone-marrow-lesions-initial-experience-of-the-differentiation-of-nodular-hyperplastic-hematopoietic-bone-marrow-from-malignant-lesions
#9
Sunghoon Park, Kyu-Sung Kwack, Nam-Su Chung, Jinwoo Hwang, Hyun Young Lee, Jae Ho Kim
OBJECTIVE: To evaluate the ability of intravoxel incoherent motion (IVIM) diffusion-weighted magnetic resonance imaging (MRI) parameters to differentiate nodular hyperplastic hematopoietic bone marrow (HHBM) from malignant vertebral bone marrow lesions (VBMLs). MATERIALS AND METHODS: A total of 33 patients with 58 VBMLs, including 9 nodular HHBM lesions, 39 bone metastases, and 10 myelomas, were retrospectively assessed. All diagnoses were confirmed either pathologically or via image assessment...
March 6, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28263927/the-ivim-signal-in-the-healthy-cerebral-gray-matter-a-play-of-spherical-and-non-spherical-components
#10
Tim Finkenstaedt, Markus Klarhoefer, Christian Eberhardt, Anton S Becker, Gustav Andreisek, Andreas Boss, Cristina Rossi
The intra-voxel incoherent motion (IVIM) model assumes that blood flowing in isotropically distributed capillary segments induces a phase dispersion of the MR signal, which increases the signal attenuation in diffusion-weighted images. However, in most tissue types the capillary network has an anisotropic micro-architecture. In this study, we investigated the possibility to indirectly infer the anisotropy of the capillary network in the healthy cerebral gray matter by evaluating the dependence of the IVIM signal from the direction of the diffusion-encoding...
March 3, 2017: NeuroImage
https://www.readbyqxmd.com/read/28257439/diminished-liver-microperfusion-in-fontan-patients-a-biexponential-dwi-study
#11
Hildebrand Dijkstra, Djoeke Wolff, Joost P van Melle, Beatrijs Bartelds, Tineke P Willems, Matthijs Oudkerk, Hans Hillege, Aad P van den Berg, Tjark Ebels, Rolf M F Berger, Paul E Sijens
It has been demonstrated that hepatic apparent diffusion coefficients (ADC) are decreasing in patients with a Fontan circulation. It remains however unclear whether this is a true decrease of molecular diffusion, or rather reflects decreased microperfusion due to decreased portal blood flow. The purpose of this study was therefore to differentiate diffusion and microperfusion using intravoxel incoherent motion (IVIM) modeled diffusion-weighted imaging (DWI) for different liver segments in patients with a Fontan circulation, compare to a control group, and relate with liver function, chronic hepatic congestion and hepatic disease...
2017: PloS One
https://www.readbyqxmd.com/read/28225579/intravoxel-incoherent-motion-mri-assessment-of-chemoradiation-induced-pelvic-bone-marrow-changes-in-cervical-cancer-and-correlation-with-hematological-toxicity
#12
Elaine Yuen Phin Lee, Jose Angelo Udal Perucho, Vince Vardhanabhuti, Jian He, Steven Wai Kwan Siu, Siew Fei Ngu, Nina A Mayr, William T C Yuh, Queenie Chan, Pek-Lan Khong
PURPOSE: To investigate bone marrow changes after chemoradiation (CRT) using intravoxel incoherent motion magnetic resonance imaging (IVIM-MRI) and correlate imaging changes with hematological toxicity (HT) in patients with locally advanced cervical cancer. MATERIALS AND METHODS: Thirty-nine patients with newly diagnosed cervical cancer were prospectively recruited for two sequential 3.0T IVIM-MRI studies: before treatment (MRI-1) and 3-4 weeks after standardized CRT (MRI-2)...
February 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28225064/intravoxel-incoherent-motion-diffusion-weighted-mr-imaging-in-assessing-and-characterizing-solitary-pulmonary-lesions
#13
Qi Wan, Ying-Shi Deng, Jia-Xuan Zhou, Yu-Dong Yu, Ying-Ying Bao, Qiang Lei, Hou-Jin Chen, Ya-Hui Peng, Ying-Jie Mei, Qing-Si Zeng, Xin-Chun Li
This study aimed to investigate the potential of intravoxel incoherent motion (IVIM) diffusion-weighted MR imaging in assessing solitary pulmonary lesions (SPLs). Sixty-two patients with pathologically confirmed SPLs, including 51 and 11 cases of malignant and benign lesions, respectively, were assessed. Diffusion weighted imaging (DWI) with 13 b values was used to derive apparent diffusion coefficient (ADC) and IVIM parameters, including true diffusion coefficient (D), pseudo-diffusion coefficient (D*), and perfusion fraction (f)...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211619/intravoxel-incoherent-motion-diffusion-weighted-imaging-of-bone-marrow-in-patients-with-acute-myeloid-leukemia-a-pilot-study-of-prognostic-value
#14
Jinliang Niu, Wenjin Li, Hongwei Wang, Wenqi Wu, Tong Gong, Ning Huang, Jun Wang, Yan Qi
PURPOSE: To investigate the value of intravoxel incoherent motion (IVIM) parameters in evaluation of prognosis in patients with acute myeloid leukemia (AML) before treatment. MATERIALS AND METHODS: Fifty-three patients before standard chemotherapy underwent MRI scans at 1.5 Tesla using conventional diffusion weighted imaging (DWI) and IVIM (b = 0, 10, 25, 50, 100, 200, 400, 600, 800, 1000, 1200 s/mm(2) ) in the sagittal plane covering the lumbar bone marrow...
February 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28205351/functional-assessment-of-the-kidneys-in-a-10%C3%A2-month-old-child-with-renal-artery-stenosis-by-intravoxel-incoherent-motion
#15
Jochen Herrmann, Harald Ittrich, Michael Gerhard Kaul, Michael Groth, Magdalini Tozakidou, Martin Blohm, Jun Oh, Gerhard Adam
Renovascular stenosis is an important cause for arterial hypertension in childhood. We report a 10-month-old girl with arterial hypertension caused by right-sided renal artery stenosis detected by Doppler ultrasound. Magnetic resonance imaging (MRI) was performed before renal artery angioplasty to depict vascular anatomy in detail and to retrieve additional functional information of the kidneys by analysis of intravoxel incoherent motion (IVIM). The value of quantitative diffusion weighted imaging of the kidneys prior to percutaneous transluminal renal angioplasty (PTRA) is discussed...
March 2017: Nephrology
https://www.readbyqxmd.com/read/28180186/non-parametric-intravoxel-incoherent-motion-analysis-of-the-thyroid-gland
#16
Anton S Becker, Moritz C Wurnig, Tim Finkenstaedt, Andreas Boss
PURPOSE: To implement a protocol for intravoxel incoherent motion (IVIM) of the thyroid, to determine base parameters in healthy volunteers, and to provide preliminary experience on clinical applicability in one patient. MATERIALS AND METHODS: Eight healthy volunteers underwent 3T MRI using a diffusion weighted echo-planar imaging sequence with 12 different b-values between 0-800 s/mm(2). The IVIM parameters diffusion coefficient D, pseudo-diffusion coefficient D*, perfusion fraction Fp, and the optimal b-values thresholds were calculated for each thyroid lobe, muscle tissue and the cerebrospinal fluid (CSF) using a non-parametric multi-step algorithm and compared with a Student's t-test...
January 2017: Heliyon
https://www.readbyqxmd.com/read/28180080/simultaneous-investigation-of-microvasculature-and-parenchyma-in-cerebral-small-vessel-disease-using-intravoxel-incoherent-motion-imaging
#17
Sau May Wong, C Eleana Zhang, Frank C G van Bussel, Julie Staals, Cécile R L P N Jeukens, Paul A M Hofman, Robert J van Oostenbrugge, Walter H Backes, Jacobus F A Jansen
INTRODUCTION: Cerebral small vessel disease (cSVD) is associated with microvascular and parenchymal alterations. Intravoxel incoherent motion (IVIM) MRI has been proposed to simultaneously measure both the microvascular perfusion and parenchymal diffusivity. This study aimed to evaluate the application of IVIM in cSVD to assess the microvasculature and parenchymal microstructure. METHODS: Seventy-three patients with cSVD (age 70 ± 11 y) and thirty-nine controls (age 69 ± 12 y) underwent IVIM imaging (3T)...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28152252/can-diffusion-weighted-imaging-serve-as-a-biomarker-of-fibrosis-in-pancreatic-adenocarcinoma
#18
Elizabeth M Hecht, Michael Z Liu, Martin R Prince, Sachin Jambawalikar, Helen E Remotti, Stuart W Weisberg, Donald Garmon, Sara Lopez-Pintado, Yanghee Woo, Michael D Kluger, John A Chabot
PURPOSE: To assess the relationship between diffusion-weighted imaging (DWI) and intravoxel incoherent motion (IVIM)-derived quantitative parameters (apparent diffusion coefficient [ADC], perfusion fraction [f], Dslow , diffusion coefficient [D], and Dfast , pseudodiffusion coefficient [D*]) and histopathology in pancreatic adenocarcinoma (PAC). MATERIALS AND METHODS: Subjects with suspected surgically resectable PAC were prospectively enrolled in this Health Insurance Portability and Accountability Act (HIPAA)-compliant, Institutional Review Board-approved study...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28152250/intravoxel-incoherent-motion-mri-in-the-brain-impact-of-the-fitting-model-on-perfusion-fraction-and-lesion-differentiability
#19
Vera C Keil, Burkhard Mädler, Gerrit H Gielen, Bogdan Pintea, Kanishka Hiththetiya, Alisa R Gaspranova, Jürgen Gieseke, Matthias Simon, Hans H Schild, Dariusch R Hadizadeh
PURPOSE: To investigate the effect of the choice of the curve-fitting model on the perfusion fraction (fIVIM ) with regard to tissue type characterization, correlation with microvascular anatomy, and dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters. Several curve-fitting models coexist in intravoxel incoherent motion (IVIM) MRI to derive the (fIVIM ). MATERIALS AND METHODS: In all, 29 patients with brain lesions (12 gliomas, 11 meningiomas, three metastases, two gliotic scars, one multiple sclerosis) underwent IVIM-MRI (32 b-values, 0 to 2000 s/mm(2) ) at 3T...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28144814/intravoxel-incoherent-motion-ivim-%C3%A2-diffusion-weighted-imaging-dwi-in-the-periferic-prostate-cancer-detection-and-stratification
#20
Filippo Pesapane, Francesca Patella, Enrico Maria Fumarola, Silvia Panella, Anna Maria Ierardi, Giovanni Guido Pompili, Giuseppe Franceschelli, Salvatore Alessio Angileri, Alberto Magenta Biasina, Gianpaolo Carrafiello
The aim of this study was to compare the Intravoxel Incoherent Motion (IVIM) parameters between healthy Peripheral Zone (PZ), Benign Prostatic Hyperplasia (BPH) and Prostate Cancer (PCa) and compare them to assess whether there was correlation with Gleason Score (GS) grading system. Thirty-one patients with suspect of PCa underwent 1.5T Multi-Parametric Magnetic Resonance Imaging (MP-MRI) with endorectal coil with a protocol including T2WI, DWI using 10 b values (0, 10, 20, 30, 50, 80, 100, 200, 400, 1000 s/mm(2)) and DCE...
March 2017: Medical Oncology
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