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Intravoxel incoherent motion

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https://www.readbyqxmd.com/read/30091719/a-general-threshold-filtering-method-for-improving-intravoxel-incoherent-motion-parameter-estimates
#1
Chieh Lin, Chih-Chieh Liu, Hsuan-Ming Huang
In this study, we present an image denoising method for diffusion-weighted magnetic resonance imaging (DW-MRI) data. Our aim is to improve the estimation of intravoxel incoherent motion (IVIM) parameters using denoised DW-MRI data. A general-threshold filtering (GTF) reconstruction via total variation minimization has been proposed to improve image quality in few-view computed tomography. Here, we applied the combination of GTF and total difference to image denoising. Voxel-wise IVIM analysis was performed using both real and simulated DW-MRI data...
August 9, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/30086857/intravoxel-incoherent-motion-mri-for-differentiating-sinonasal-small-round-cell-malignant-tumours-srcmts-from-non-srcmts-comparison-and-correlation-with-dynamic-contrast-enhanced-mri
#2
Y Zhong, Z Xiao, Z Tang, J Qiang, R Wang
AIM: To investigate the value of intravoxel incoherent motion (IVIM) in the differentiation of sinonasal small round cell malignant tumours (SRCMTs) from non-SRCMTs and to compare and correlate these results with those of dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI). MATERIALS AND METHODS: Ninety patients with histologically confirmed sinonasal malignant tumours (53 SRCMTs and 37 non-SRCMTs) who underwent conventional MRI, IVIM, and DCE-MRI before treatment were enrolled...
August 4, 2018: Clinical Radiology
https://www.readbyqxmd.com/read/30081421/short-term-measurement-repeatability-of-a-simplified-intravoxel-incoherent-motion-ivim-analysis-for-routine-clinical-diffusion-weighted-imaging-in-malignant-liver-lesions-and-liver-parenchyma-at-1-5-t
#3
Claus Christian Pieper, Alois Martin Sprinkart, Guido Mattias Kukuk, Petra Mürtz
OBJECTIVES:  To evaluate measurement repeatability of parameters derived from simplified intravoxel incoherent motion (IVIM) analysis of diffusion-weighted imaging (DWI) using 3 b-values. MATERIALS AND METHODS:  24 patients (16 male, 8 female, mean age: 67 years) with hepatic malignancy (HCC: 10, metastases: 14) underwent 29 liver MRI examinations at 1.5 T. Respiratory-triggered DWI (b = 0, 50, 800 s/mm2 ) was acquired twice. Parameter maps of the apparent diffusion coefficient ADC(0,800), estimated diffusion coefficient D' and perfusion fraction f' were calculated...
August 6, 2018: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/30064919/multiparametric-mri-characterization-of-funaki-types-of-uterine-fibroids-considered-for-mr-guided-high-intensity-focused-ultrasound-mr-hifu-therapy
#4
Sajan Andrews, Qing Yuan, April Bailey, Yin Xi, Rajiv Chopra, Robert Staruch, Ivan Pedrosa
RATIONALE AND OBJECTIVES: To compare quantitative multiparametric magnetic resonance imaging (mpMRI) data of symptomatic uterine fibroids being considered for MR-guided high-intensity focused ultrasound ablation with fibroid characterization based on the Funaki Classification scheme. MATERIALS AND METHODS: This was a prospective, Institutional Review Board -approved, Health Insurance Portability, and Accountability Act-compliant study. Informed consent was obtained...
July 28, 2018: Academic Radiology
https://www.readbyqxmd.com/read/30045324/predicting-chemoradiotherapy-response-of-nasopharyngeal-carcinoma-using-texture-features-based-on-intravoxel-incoherent-motion-diffusion-weighted-imaging
#5
Yuhui Qin, Xiaoping Yu, Jing Hou, Ying Hu, Feiping Li, Lu Wen, Qiang Lu, Yi Fu, Siye Liu
The aim of the study was to investigative the utility of gray-level co-occurrence matrix (GLCM) texture analysis based on intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI) for predicting the early response to chemoradiotherapy for nasopharyngeal carcinoma (NPC).Baseline IVIM-DWI was performed on 81 patients with NPC receiving chemoradiotherapy in a prospective nested case-control study. The patients were categorized into the residue (n = 11) and nonresidue (n = 70) groups, according to whether there was local residual lesion or not at the end of chemoradiotherapy...
July 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/30038468/liver-intravoxel-incoherent-motion-diffusion-weighted-imaging-for-the-assessment-of-hepatic-steatosis-and-fibrosis-in-children
#6
Hyun Joo Shin, Haesung Yoon, Myung-Joon Kim, Seok Joo Han, Hong Koh, Seung Kim, Mi-Jung Lee
AIM: To evaluate the correlation between intravoxel incoherent motion (IVIM) diffusion-weighted imaging (DWI) parameters and the degree of hepatic steatosis and fibrosis in children. METHODS: This retrospective study was approved by the institutional review board. The children (≤ 18 years) who underwent liver IVIM DWI with 8 b -values under the suspicion of hepatic steatosis or fibrosis from February 2013 to November 2016 were included. Subjects were divided into normal, fatty liver (FAT), and fibrotic liver (FIB) groups...
July 21, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/30027411/intravoxel-incoherent-motion-diffusion-weighted-imaging-for-assessment-of-histologic-grade-of-hepatocellular-carcinoma-comparison-of-three-methods-for-positioning-region-of-interest
#7
Yi Wei, Feifei Gao, Min Wang, Zixing Huang, Hehan Tang, Jiaxing Li, Yi Wang, Tong Zhang, Xiaocheng Wei, Dandan Zheng, Bin Song
OBJECTIVES: To prospectively compare the diagnostic performances of three methods of region of interest (ROI) placement for the measurements of intravoxel incoherent motion (IVIM) diffusion-weighted MR imaging in differentiating the histologic grade of hepatocellular carcinoma (HCC). METHODS: Eighty-seven patients with 91 newly diagnosed HCCs were studied using IVIM imaging. Two attending radiologists separately identified the selection of tumour tissue for ROI positioning...
July 19, 2018: European Radiology
https://www.readbyqxmd.com/read/30019143/diffusion-and-perfusion-mri-quantification-in-ileal-crohn-s-disease
#8
Stefanie J Hectors, Sonja Gordic, Sahar Semaan, Octavia Bane, Robert Hirten, Xiaoyu Jia, Jean-Frederic Colombel, Bachir Taouli
OBJECTIVES: To quantify intravoxel incoherent motion (IVIM)-DWI and dynamic contrast-enhanced (DCE)-MRI parameters in normal and abnormal ileal segments in Crohn's disease (CD) patients and to assess the association of these parameters with clinical and MRI-based measurements of CD activity. METHODS: In this prospective study, 27 CD patients (M/F 18/9, mean age 42 years) underwent MR enterography, including IVIM-DWI and DCE-MRI. IVIM-DWI and DCE-MRI parameters were quantified in normal and abnormal small bowel segments, the latter identified by the presence of inflammatory changes...
July 17, 2018: European Radiology
https://www.readbyqxmd.com/read/30017300/preoperative-histogram-analysis-of-intravoxel-incoherent-motion-ivim-for-predicting-microvascular-invasion-in-patients-with-single-hepatocellular-carcinoma
#9
Hongxiang Li, Jing Zhang, Zeyu Zheng, Yihao Guo, Maodong Chen, Caiqin Xie, Zhongping Zhang, Yingjie Mei, Yanqiu Feng, Yikai Xu
PURPOSE: To evaluate the value of intravoxel incoherent motion (IVIM) histogram analysis based on whole tumor volume in predicting microvascular invasion (MVI) of single hepatocellular carcinoma (HCC). MATERIALS AND METHODS: The study enrolled 41 patients with pathologically proven HCCs who underwent IVIM diffusion-weighted imaging with nine b values and contrast-enhanced magnetic resonance imaging (MRI). Histogram parameters including mean; skewness; kurtosis; and percentiles (5th, 10th, 25th, 50th, 75th, 90th, 95th) were derived from apparent diffusion coefficient (ADC), perfusion fraction (f), true diffusion coefficient (D), and pseudo diffusion coefficient (D*)...
August 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30012524/emerging-magnetic-resonance-imaging-technologies-for-radiation-therapy-planning-and-response-assessment
#10
REVIEW
Kyle M Jones, Keith A Michel, James A Bankson, Clifton D Fuller, Ann H Klopp, Aradhana M Venkatesan
Functional and molecular MRI techniques are capable of measuring biologic properties of tumor tissue. Knowledge of these biological properties may improve radiation treatment by more accurately identifying tumor volumes, characterizing radioresistant subvolumes of tumor before radiation therapy (RT), and identifying recurrent disease after RT. Intravoxel incoherent motion MRI, blood oxygenation level-dependent MRI, tissue oxygenation level-dependent MRI, hyperpolarized 13 C MRI, and chemical exchange saturation transfer MRI are relatively new MRI techniques that have shown promise for contributing to RT planning and response assessment...
August 1, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29987417/correction-to-mri-assessment-of-the-thigh-musculature-in-dermatomyositis-and-healthy-subjects-using-diffusion-tensor-imaging-intravoxel-incoherent-motion-and-dynamic-dti
#11
E E Sigmund, S H Baete, T Luo, K Patel, D Wang, I Rossi, A Duarte, M Bruno, D Mossa, A Femia, S Ramachandran, D Stoffel, J S Babb, A G Franks, J Bencardino
The original version of this article, published on 04 June 2018, unfortunately contained a mistake.
July 9, 2018: European Radiology
https://www.readbyqxmd.com/read/29953932/a-histogram-analysis-of-diffusion-and-perfusion-features-of-cervical-cancer-based-on-intravoxel-incoherent-motion-magnetic-resonance-imaging
#12
Deepa Thapa, Panying Wang, Guangyao Wu, Xiangyu Wang, Qunqi Sun
OBJECTIVE: To evaluate the diagnostic potential based on histogram analysis of IVIM parameters between uterine cervical cancers (CC) - normal myometrium (Myo) versus CC - gluteus maximus muscle (GM) and to study the feasibility of histogram analysis of IVIM parameters to differentiate the early from locally advanced stage CCs. METHODS: 64 patients with pathologically confirmed CC were enrolled. Histogram indices mean, median, 25th, and ð 75th percentile of apparent diffusion coefficient (ADC), true diffusion coefficient (D), pseudo-diffusion coefficient (D*), and perfusion fraction (f) value of entire tumor were statistically analyzed and compared between CC - GM versus CC - Myo, as well as between early and locally advanced stage CCs...
June 25, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29952951/quantitative-evaluation-of-intravoxel-incoherent-motion-diffusion-weighted-imaging-ivim-for-differential-diagnosis-and-grading-prediction-of-benign-and-malignant-breast-lesions
#13
Xijin Mao, Xuexue Zou, Ning Yu, Xingyu Jiang, Jing Du
BACKGROUND: That breast carcinoma is the most common malignant lesion in women. This study aimed to differentiate benign from malignant breast lesions and to predict grading of the latter by comparing the diagnostic value of different parameters in intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI). MATERIALS AND METHODS: Retrospective analysis was performed utilizing imaging and pathological data from 112 patients with 124 breast lesions that underwent IVIM-DWI examination with 3...
June 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29951899/intravoxel-incoherent-motion-diffusion-weighted-mr-imaging-of-solid-pancreatic-masses-reliability-and-usefulness-for-characterization
#14
Riccardo De Robertis, Nicolò Cardobi, Silvia Ortolani, Paolo Tinazzi Martini, Alto Stemmer, Robert Grimm, Stefano Gobbo, Giovanni Butturini, Mirko D'Onofrio
PURPOSE: IVIM-DW imaging has shown potential usefulness in the study of pancreatic lesions. Controversial results are available regarding the reliability of the measurements of IVIM-derived parameters. The aim of this study was to evaluate the reliability and the diagnostic potential of IVIM-derived parameters in differentiation among focal solid pancreatic lesions and normal pancreas (NP). METHODS: Fifty-seven patients (34 carcinomas-PDACs, 18 neuroendocrine neoplasms-panNENs, and 5 autoimmune pancreatitis-AIP) and 50 subjects with NP underwent 1...
June 28, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29945958/combined-mr-imaging-of-oxygen-consumption-and-supply-reveals-tumor-hypoxia-and-aggressiveness-in-prostate-cancer-patients
#15
Tord Hompland, Knut Håkon Hole, Harald Bull Ragnum, Eva-Katrine Aarnes, Ljiljana Vlatkovic, A Kathrine Lie, Sebastian Patzke, Bjørn Brennhovd, Therese Seierstad, Heidi Lyng
The established role of hypoxia-induced signaling in prostate cancer growth, metastasis, and response to treatment suggests that a method to image hypoxia in tumors could aid treatment decisions. Here we present consumption and supply-based hypoxia (CSH) imaging, an approach that integrates images related to oxygen consumption and supply into a single image. This integration algorithm was developed in prostate cancer patients receiving hypoxia marker pimonidazole prior to prostatectomy. We exploited the intravoxel incoherent motion (IVIM) signal in diagnostic diffusion-weighted (DW) magnetic resonance (MR) images to generate separate images of the apparent diffusion coefficient (ADC) and fractional blood volume (fBV)...
June 26, 2018: Cancer Research
https://www.readbyqxmd.com/read/29908978/feasibility-of-intravoxel-incoherent-motion-for-differentiating-benign-and-malignant-thyroid-nodules
#16
Hui Tan, Jun Chen, Yi Ling Zhao, Jin Huan Liu, Liang Zhang, Chang Sheng Liu, Dongjie Huang
RATIONALE AND OBJECTIVES: This study aimed to preliminarily investigate the feasibility of intravoxel incoherent motion (IVIM) theory in the differential diagnosis of benign and malignant thyroid nodules. MATERIALS AND METHODS: Forty-five patients with 56 confirmed thyroid nodules underwent preoperative routine magnetic resonance imaging and IVIM diffusion-weighted imaging. The histopathologic diagnosis was confirmed by surgery. Apparent diffusion coefficient (ADC), perfusion fraction f, diffusivity D, and pseudo-diffusivity D* were quantified...
June 13, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29872492/evaluation-of-liver-fibrosis-with-a-monoexponential-model-of-intravoxel-incoherent-motion-magnetic-resonance-imaging
#17
Cuiyun Chen, Fangfang Fu, Jing Zhang, Fangfang Guo, Meiyun Wang, Shaocheng Zhu, Dapeng Shi, Yuwei Tian
To evaluate hepatic fibrosis with a monoexponential model of intravoxel incoherent motion magnetic resonance imaging, and assess the potential application value of intravoxel incoherent motion (IVIM) in diffusion-weighted imaging (IVIM-DWI) in determining staging of liver fibrosis. 28 patients with hepatic fibrosis and 25 volunteers with healthy livers had IVIM examination and conventional MRI. All standard apparent diffusion coefficient (ADC) values of IVIM raw data were post-processed off-line after completion of data collection...
May 15, 2018: Oncotarget
https://www.readbyqxmd.com/read/29869178/mri-assessment-of-the-thigh-musculature-in-dermatomyositis-and-healthy-subjects-using-diffusion-tensor-imaging-intravoxel-incoherent-motion-and-dynamic-dti
#18
E E Sigmund, S H Baete, T Luo, K Patel, D Wang, I Rossi, A Duarte, M Bruno, D Mossa, A Femia, S Ramachandran, D Stoffel, J S Babb, A G Franks, J Bencardino
INTRODUCTION: Dermatomyositis (DM) is an idiopathic inflammatory myopathy involving severe debilitation in need of diagnostics. We evaluated the proximal lower extremity musculature with diffusion tensor imaging (DTI), intravoxel incoherent motion (IVIM) and dynamic DTI in DM patients and controls and compared with standard clinical workup.  METHODS: In this IRB-approved, HIPAA-compliant study with written informed consent, anatomical, Dixon fat/water and diffusion imaging were collected in bilateral thigh MRI of 22 controls and 27 DM patients in a 3T scanner...
June 4, 2018: European Radiology
https://www.readbyqxmd.com/read/29863413/value-of-intravoxel-incoherent-motion-for-differential-diagnosis-of-renal-tumors
#19
Qingqiang Zhu, Wenrong Zhu, Jing Ye, Jingtao Wu, Wenxin Chen, Zhihua Hao
Background Few studies have reported on the use of intravoxel incoherent motion (IVIM) for renal tumors. Purpose To investigate the value of IVIM for distinguishing renal tumors. Material and Methods Thirty-one patients with clear cell renal cell carcinomas (CCRCCs), 13 patients with renal angiomyolipomas with minimal fat (RAMFs), eight patients with chromophobe renal cell carcinomas (ChRCCs), and ten patients with papillary renal cell carcinomas (PRCCs) were examined. The tissue diffusivity (D), pseudodiffusivity (D*), and perfusion fraction (f) were calculated...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29852212/intravoxel-incoherent-motion-diffusion-weighted-magnetic-resonance-imaging-in-characterization-of-axillary-lymph-nodes-preliminary-animal-experience
#20
Yueqiang Zhu, Xubin Li, Fengkui Wang, Jun Zhang, Wei Li, Yan Ma, Jin Qi, Song Ren, Zhaoxiang Ye
PURPOSE: To investigate the diagnostic value of intravoxel incoherent motion (IVIM) diffusion-weighted imaging (DWI) for discriminating axillary metastatic from non-metastatic lymph nodes (LNs) in rabbit models. MATERIALS AND METHODS: The institutional animal care and use committee approved this study. Forty New Zealand white rabbits were randomly divided into two groups. The axillary LN models were created by inoculating VX2 cell suspension and complete Freund's adjuvant in the mammary glands of 20 female rabbits of each group, respectively...
May 28, 2018: Magnetic Resonance Imaging
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