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multiparametric magnetic resonance imaging

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https://www.readbyqxmd.com/read/28096922/relationship-between-gleason-score-and-apparent-diffusion-coefficients-of-diffusion-weighted-magnetic-resonance-imaging-in-prostate-cancer-patients
#1
Tae Heon Kim, Chan Kyo Kim, Byung Kwan Park, Hwang Gyun Jeon, Byung Chang Jeong, Seong Il Seo, Hyun Moo Lee, Han Yong Choi, Seong Soo Jeon
INTRODUCTION: We assessed the correlation between the apparent diffusion coefficient (ADC) and pathological Gleason score (GS) of prostate cancer patients. METHODS: A total of 125 patients who underwent multiparametric magnetic resonance imaging before radical prostatectomy for prostate cancer were included in this study. ADC values were compared with different GS. We used receiver operating characteristic analysis and determined the ADC cutoff value to differentiate tumours with a GS of 6 from those with a GS ≥7...
November 2016: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28094057/multiparametric-magnetic-resonance-imaging-targeted-biopsy-for-early-detection-of-prostate-cancer-all-that-glitters-is-not-gold
#2
EDITORIAL
Gianluca Giannarini, Alessandro Crestani, Marta Rossanese, Vincenzo Ficarra
No abstract text is available yet for this article.
January 13, 2017: European Urology
https://www.readbyqxmd.com/read/28089429/diagnosis-and-quantification-of-fibrosis-steatosis-and-hepatic-siderosis-through-multiparametric-magnetic-resonance-imaging
#3
M Stoopen-Rometti, E R Encinas-Escobar, C R Ramirez-Carmona, E Wolpert-Barraza, E Kimura-Hayama, L A Sosa-Lozano, R Favila, Y Kimura-Fujikami, J A Saavedra-Abril, A Loaeza-Del Castillo
BACKGROUND: The presence of liver fibrosis is the common denominator in numerous chronic liver diseases that can progress to fibrosis and hepatocellular carcinoma. Most important, with respect to frequency, are viral hepatitis and non-alcoholic fatty liver disease, the prevalence of which is increasing in epidemic proportions. Liver biopsy, albeit imperfect, continues to be the criterion standard, but in many clinical situations tends to be replaced with noninvasive imaging methods. OBJECTIVES: The aim of the present article was to describe our imaging department experience with magnetic resonance elastography and to analyze and discuss recently published results in gastroenterology, hepatology, and radiology from other authors in the literature, complemented with a PubMed search covering the last 10 years...
January 12, 2017: Revista de Gastroenterología de México
https://www.readbyqxmd.com/read/28087898/editorial-comment-to-assessing-clinically-significant-prostate-cancer-diagnostic-properties-of-multiparametric-magnetic-resonance-imaging-compared-to-three-dimensional-transperineal-template-mapping-histopathology
#4
Claudia Kesch, Boris A Hadaschik, Jan P Radtke
No abstract text is available yet for this article.
January 13, 2017: International Journal of Urology: Official Journal of the Japanese Urological Association
https://www.readbyqxmd.com/read/28042334/visualization-quantification-and-characterization-of-caerulein-induced-acute-pancreatitis-in-rats-by-3-0t-clinical-mri-biochemistry-and-histomorphology
#5
Ting Yin, Ronald Peeters, Yewei Liu, Yuanbo Feng, Xinyuan Zhang, Yansheng Jiang, Jie Yu, Steven Dymarkowski, Uwe Himmelreich, Raymond Oyen, Yicheng Ni
Purpose: To investigate whether Caerulein-induced acute pancreatitis (AP) in rats could be noninvasively studied by clinical magnetic resonance imaging (MRI) techniques and validated by enzymatic biochemistry and histomorphology. Materials and Methods: The study was approved by the institutional animal ethical committee. The AP was induced in 26 rats by intraperitoneal injections of Caerulein, as compared to 6 normal rats. T2-weighted 3D MRI, T2 relaxation measurement and contrast enhanced T1-weighted MRI were performed at 3 Tesla...
2017: Theranostics
https://www.readbyqxmd.com/read/28031053/serum-biomarkers-and-changes-in-clinical-mri-evidence-of-golimumab-treated-patients-with-ankylosing-spondylitis-results-of-the-randomized-placebo-controlled-go-raise-study
#6
Robert D Inman, Xenofon Baraliakos, Kay-Geert A Hermann, Jürgen Braun, Atul Deodhar, Désirée van der Heijde, Stephen Xu, Benjamin Hsu
BACKGROUND: In the present study, we evaluated relationships between serum biomarkers and clinical/magnetic resonance imaging (MRI) findings in golimumab-treated patients with ankylosing spondylitis. METHODS: In the GO-RAISE study, 356 patients with ankylosing spondylitis randomly received either placebo (n = 78) or golimumab 50 mg or 100 mg (n = 278) injections every 4 weeks through week 24 (placebo-controlled); patients continuing GO-RAISE received golimumab through week 252...
December 28, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28012730/magnetic-resonance-imaging-of-the-prostate-interpretation-using-the-pi-rads-v2
#7
A Torregrosa Andrés, M Otero García, M Sineiro Galiñanes
OBJECTIVE: Version 2 of the Prostate Imaging and Reporting and Data System (PI-RADS) was developed to help in the detection, location, and characterization of prostate cancer with magnetic resonance imaging (MRI). Its recommendations for standardizing image acquisition parameters aims to reduce variability in the interpretation of MRI studies of the prostate; this approach, together with structured reporting, has the added value of improving communication among radiologists and between radiologists and urologists...
December 21, 2016: Radiología
https://www.readbyqxmd.com/read/28012728/magnetic-resonance-imaging-in-the-new-paradigm-for-the-diagnosis-of-prostate-cancer
#8
J C Vilanova, V Catalá
For various reasons, prostate cancer is a major public health problem. It is a very common cancer, but has a very low mortality rate because it comprises two types of disease: one insignificant, indolent, and much more common, and the other aggressive, significant, and much less common. The routine diagnostic approach to prostate cancer has been systematic blind biopsies, which has low detection rates and might detect low risk, insignificant prostate cancer, leading to overdiagnosis and overtreatment of indolent cancers...
December 21, 2016: Radiología
https://www.readbyqxmd.com/read/28002239/feasibility-of-multiparametric-magnetic-resonance-imaging-of-the-prostate-at-7-t
#9
Miriam W Lagemaat, Bart W J Philips, Eline K Vos, Mark J van Uden, Jurgen J Fütterer, Sjoerd F Jenniskens, Tom W J Scheenen, Marnix C Maas
OBJECTIVES: The aim of this study was to evaluate the technical feasibility of prostate multiparametric magnetic resonance imaging (mpMRI) at a magnetic field strength of 7 T. MATERIALS AND METHODS: In this prospective institutional review board-approved study, 14 patients with biopsy-proven prostate cancer (mean age, 65.2 years; median prostate-specific antigen [PSA], 6.2 ng/mL), all providing signed informed consent, underwent 7 T mpMRI with an external 8-channel body-array transmit coil and an endorectal receive coil between September 2013 and October 2014...
December 20, 2016: Investigative Radiology
https://www.readbyqxmd.com/read/27995303/integration-of-mri-to-clinical-nomogram-for-predicting-pathological-stage-before-radical-prostatectomy
#10
Cedric Lebacle, Françoise Roudot-Thoraval, Anissa Moktefi, Mohamed Bouanane, Alexandre De La Taille, Laurent Salomon
BACKGROUND: Debate persists regarding whether MRI should be used routinely for preoperative evaluation of prostate cancer. OBJECTIVE: The aim is to assess the role of prostatic magnetic resonance imaging (MRI) and other preoperative data in extra-prostatic extension (EPE) evaluation. PATIENTS AND METHODS: From 2000 to 2013, 1743 patients operated for radical prostatectomy had a preoperative MRI. Age, clinical stage with digital rectal exam (DRE), PSA, prostate weight, biopsy, MRI and pathological findings of the surgical specimen were noticed...
December 19, 2016: World Journal of Urology
https://www.readbyqxmd.com/read/27987276/in-gantry-mri-guided-prostate-biopsy-diagnosis-of-prostatitis-and-its-relationship-with-pirads-v-2-based-score
#11
Rajeev Jyoti, Noel Hamesh Jina, Hodo Z Haxhimolla
INTRODUCTION: The recent literature has focussed predominantly on prostate cancer detection which has been revolutionized by multiparametric magnetic resonance imaging (mpMRI). Due to an overlap of features, prostatitis may mimic prostate cancer on MRI, especially in patients with chronic prostatitis. We retrospectively analysed our in-gantry MRI-guided biopsy (MRGB) results to determine incidental detection rate of prostatitis in Prostate Imaging Reporting and Data System (PIRADS) 3, 4 and 5 foci reported on diagnostic MRI of the prostate...
December 16, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27986208/advances-in-prostate-cancer-magnetic-resonance-imaging-and-positron-emission-tomography-computed-tomography-for-staging-and-radiotherapy-treatment-planning
#12
REVIEW
Drew Moghanaki, Baris Turkbey, Neha Vapiwala, Behfar Ehdaie, Steven J Frank, Patrick W McLaughlin, Mukesh Harisinghani
Conventional prostate cancer staging strategies have limited accuracy to define the location, grade, and burden of disease. Evaluations have historically relied upon prostate-specific antigen levels, digital rectal examinations, random systematic biopsies, computed tomography, pelvic lymphadenectomy, or (99m)technetium methylene diphosphonate bone scans. Today, risk-stratification tools incorporate these data in a weighted format to guide management. However, the limitations and potential consequences of their uncertainties are well known...
January 2017: Seminars in Radiation Oncology
https://www.readbyqxmd.com/read/27981751/liver-fibrosis-review-of-current-imaging-and-mri-quantification-techniques
#13
REVIEW
Léonie Petitclerc, Giada Sebastiani, Guillaume Gilbert, Guy Cloutier, An Tang
: Liver fibrosis is characterized by the accumulation of extracellular matrix proteins such as collagen in the liver interstitial space. All causes of chronic liver disease may lead to fibrosis and cirrhosis. The severity of liver fibrosis influences the decision to treat or the need to monitor hepatic or extrahepatic complications. The traditional reference standard for diagnosis of liver fibrosis is liver biopsy. However, this technique is invasive, associated with a risk of sampling error, and has low patient acceptance...
December 16, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27955940/magnetic-resonance-imaging-transrectal-ultrasound-fusion-focal-cryotherapy-of-the-prostate-a-prospective-development-study
#14
Massimo Valerio, Taimur Tariq Shah, Paras Shah, Neil Mccartan, Mark Emberton, Manit Arya, Hashim Uddin Ahmed
OBJECTIVES: The use of software-based magnetic resonance-transrectal ultrasound fusion to deliver focal therapy may increase the precision of treatment. This is a prospective development study assessing the feasibility of Magnetic resonance imaging-transrectal ultrasound (MRI-TRUS) fusion focal cryotherapy. METHODS AND MATERIALS: Consecutive patients undergoing focal cryotherapy were included in an academic registry (December 2013-June 2014). MRI-TRUS fusion focal cryotherapy was offered to men with visible clinically significant prostate cancer (Galil SeedNet system)...
December 7, 2016: Urologic Oncology
https://www.readbyqxmd.com/read/27943099/incremental-value-of-high-b-value-diffusion-weighted-magnetic-resonance-imaging-at-3-t-for-prediction-of-extracapsular-extension-in-patients-with-prostate-cancer-preliminary-experience
#15
Ayumu Kido, Tsutomu Tamada, Teruki Sone, Naoki Kanomata, Yoshiyuki Miyaji, Akira Yamamoto, Katsuyoshi Ito
PURPOSE: To investigate whether high b value diffusion-weighted imaging (DWI) contributes to the improvement of diagnostic ability of extracapsular extension (ECE) in prostate cancer (PC). MATERIALS AND METHODS: Forty-three patients with PC underwent multiparametric MRI including DWI (b values: 0, 2000 s/mm(2)) at 3-T. Two radiologists assessed the presence of ECE and the diagnostic certainty degree using conventional diagnostic method by consensus. Tumor apparent diffusion coefficient (ADC, ×10(-3) mm(2)/s) was also measured...
December 9, 2016: La Radiologia Medica
https://www.readbyqxmd.com/read/27939349/an-initial-negative-round-of-targeted-biopsies-in-men-with-highly-suspicious-multiparametric-magnetic-resonance-findings-does-not-exclude-clinically-significant-prostate-cancer-preliminary-experience
#16
Daniel N Costa, Fernando U Kay, Ivan Pedrosa, Lauren Kolski, Yair Lotan, Claus G Roehrborn, Brad Hornberger, Yin Xi, Franto Francis, Neil M Rofsky
BACKGROUND: Targeted prostate biopsies are changing the landscape of prostate cancer (PCa) diagnosis with the degree of suspicion on multiparametric magnetic resonance imaging (mpMRI) being a strong predictor of targeted biopsy outcome. Data regarding the rate and potential causes of false-negative magnetic resonance imaging-transrectal ultrasound (MRI-TRUS) fusion-targeted biopsy in patients with highly suspicious mpMRI findings are lacking. OBJECTIVES: To determine the rate of clinically significant PCa detection in repeat targeted biopsy or surgery in patients with highly suspicious mpMRI findings and in an initial negative MRI-TRUS fusion-targeted biopsy...
December 8, 2016: Urologic Oncology
https://www.readbyqxmd.com/read/27937040/multiparametric-or-practical-quantitative-liver-mri-towards-millisecond-fat-fraction-kilopascal-and-function-era
#17
Emre Unal, Ilkay Sedakat Idilman, Muşturay Karçaaltıncaba
New advances in liver magnetic resonance imaging (MRI) may enable diagnosis of unseen pathologies by conventional techniques. Normal T1 (550-620 ms for 1.5 T and 700-850 ms for 3 T), T2, T2* (>20 ms), T1rho (40-50 ms) mapping, proton density fat fraction (PDFF) (≤5%) and stiffness (2-3kPa) values can enable differentiation of a normal liver from chronic liver and diffuse diseases. Gd-EOB-DTPA can enable assessment of liver function by using postcontrast hepatobiliary phase or T1 reduction rate (normally above 60%)...
February 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27919861/multiparametric-mri-in-differentiating-pulmonary-artery-sarcoma-and-pulmonary-thromboembolism-a-preliminary-experience
#18
Min Liu, Chunhai Luo, Ying Wang, Xiaojuan Guo, Zhanhong Ma, Yuanhua Yang, Tianjing Zhang
PURPOSE: We aimed to define multiparametric magnetic resonance imaging (MRI) findings to differentiate between pulmonary artery sarcoma (PAS) and pulmonary thromboembolism (PTE). METHODS: Eleven patients with suspected PTE were prospectively included to undergo pulmonary MRI before surgery or biopsy. MRI protocol included an unenhanced sequence, diffusion-weighted imaging (DWI, b=800 s/mm2) and a dynamic contrast-enhanced sequence. Morphologic characteristics including distribution, filling defect, and intensity were observed on T1-, T2-, and fat-suppressed T2-weighted imaging, DWI, and contrast-enhanced MRI...
January 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/27914180/burned-out-testis-tumors-in-asymptomatic-infertile-men-multiparametric-sonography-and-mri-findings
#19
Laurence Rocher, Ludivine Glas, Marie France Bellin, Sophie Ferlicot, Vincent Izard, Gerard Benoit, Laurence Albiges, Karim Fizazi, Jean-Michel Correas
Multiparametric testicular ultrasound and magnetic resonance imaging (MRI) findings were analyzed in a series of 10 infertile asymptomatic men presenting with pathologically confirmed burned-out testicular tumors. Color/power Doppler ultrasound (CDUS), shear wave elastography (SWE), contrast-enhanced ultrasonography (CEUS), and MRI were performed on 10, 5, 6, and 7 patients, respectively. All lesions appeared as a hypoechoic and hypovascular nodular area at CDUS, SWE, CEUS CDUS, and CEUS (if performed). Shear wave elastography showed a stiffer nodular area compared with the surrounding/contralateral tissues (13 versus 2 kPa); MRI revealed a well-delineated nodular area in hypointense signal on T2, a high apparent diffusion coefficient value, and a lack of enhancement...
December 3, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27906722/location-and-grade-of-prostate-cancer-diagnosed-by-transperineal-template-guided-mapping-biopsy-after-negative-transrectal-ultrasound-guided-biopsy
#20
Nathan Bittner, Gregory Merrick, Al Taira, Abbey Bennett, Amy Schattel, Wayne Butler, Robert Galbreath, Edward Adamovich
OBJECTIVES: To determine the location and grade of prostate cancer diagnosed by transperineal template-guided mapping (TTMB) after negative transrectal ultrasound-guided (TRUS) biopsy. MATERIALS AND METHODS: This analysis consisted of 1118 consecutive patients who underwent TTMB from January 2005 to August 2015. Eight hundred thirty-five underwent TTMB after at least 1 negative TRUS biopsy and 283 underwent TTMB as the first biopsy procedure. The study population was divided into cohorts based on the number of prior TRUS biopsy sessions (0, 1, 2, and ≥3)...
November 30, 2016: American Journal of Clinical Oncology
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