PURPOSE: To measure T1 and T2 relaxation times of normal human abdominal pelvic tissues lumbar vertebral bone marrow at 3.0 T. MATERIALS AND METHODS: Relaxation time was measured in six healthy volunteers with an inversion-recovery method different inversion a multiple spin-echo (SE) technique echo to T2, respectively. Six images were acquired during one breath hold half-Fourier acquisition single-shot fast SE sequence. Signal intensities regions interest fit theoretical curves. Measurements...

The reporting of incidental pancreatic cystic lesions on cross-sectional imaging studies has dramatically increased over the last few years. prevalence cysts in adult population, however, is unknown. aim our study was to determine incidentally detected population undergoing abdominal magnetic resonance (MR) imaging.MR examinations 616 consecutive patients obtained between January 2001 and February 2002 were retrospectively reviewed by two radiologists following information recorded: total...

To compare a T1-weighted, three-dimensional (3D), gradient-echo (GRE) sequence for magnetic resonance (MR) imaging of the body (volumetric interpolated breath-hold examination, or VIBE) with two-dimensional (2D) GRE equivalent.Twenty consecutive patients underwent 1.5-T MR imaging. The examinations included pre- and postcontrast (20 mL gadopentetate dimeglumine) fat-saturated 2D volumetric before, during (arterial phase), after injection, thin (2-mm source images) thick (8-mm reconstruction...

To retrospectively evaluate whether the enhancement patterns of pathologically proved clear cell, papillary, and chromophobe renal cell carcinomas (RCCs) measured on clinical dynamic contrast agent-enhanced magnetic resonance (MR) images permit accurate diagnosis RCC subtype.This study was Institutional Review Board approved HIPAA compliant; informed consent waived. One hundred twelve patients (76 men, 36 women; age range, 25-88 years; mean age, 58.1 years) underwent MR imaging 113 masses...

To retrospectively assess whether magnetic resonance (MR) imaging with opposed-phase and in-phase gradient-echo (GRE) sequences MR feature analysis can differentiate angiomyolipomas (AMLs) that contain minimal fat from clear cell renal carcinomas (RCCs), particular emphasis on small (<3-cm) masses.Institutional review board approval a waiver of informed consent were obtained for this HIPAA-compliant study. images 108 pathologically proved masses (88 RCCs 20 AMLs 64 men 44 women) at two...

To determine the usefulness of a timing examination performed with 1 mL gadopentetate dimeglumine administered magnetic resonance (MR) power injector at single-dose three-dimensional (3D) MR aortography.3D fast imaging steady-state precession (repetition time [msec]/echo [msec] = 5.0/2.0, 50 degrees flip angle) was in 30 patients after administration 0.1 mmol/kg dimeglumine. In 15 inpatients, used and (experimental group). outpatients, manual injection not (control examination, followed...

PURPOSE: To determine the sensitivity and specificity of magnetic resonance (MR) imaging for detection hepatocellular carcinoma (HCC) dysplastic nodules (DNs) by using explantation correlation in patients with cirrhosis no known HCC. MATERIALS AND METHODS: Seventy-one without a history HCC who underwent MR subsequent transplantation within 90 days were examined. Breath-hold turbo short inversion time inversion-recovery and/or T2-weighted spin-echo images obtained. Dynamic two- or...

To retrospectively assess the diagnostic performance of magnetic resonance (MR) imaging in pregnant patients suspected having acute appendicitis.The study was approved by committee on clinical investigations and HIPAA compliant. The informed consent requirement waived. MR images were obtained 51 consecutive (mean age, 28.3 years) who clinically appendicitis. In this protocol for patients, is performed when findings at ultrasonography (US) are inconclusive or additional information needed....

To prospectively compare the sensitivity and specificity of high-spatial-resolution dynamic contrast material-enhanced magnetic resonance (MR) imaging with those T2-weighted MR imaging, performed an endorectal coil (ERC), for assessment extracapsular extension (ECE) staging in patients prostate cancer, histopathologic findings as reference.The study was approved by institutional internal review board; a signed informed consent obtained. at 1.5 T combined surface coils ERCs 32 (mean age, 65...

The purposes of this study were to investigate the use computed tomography (CT) imaging in patients with suspected acute appendicitis and evaluate impact CT on negative appendectomy perforation rates. In clinically diagnosed reported overall rate is about 15-20%; 10% men 25-45% women childbearing age. This associated a 21-23%.This retrospective analysis 146 consecutive presenting clinical symptoms suspicious over 2-yr period whom examinations performed before therapy was instituted. rates...

PURPOSE: To evaluate gadolinium-enhanced three-dimensional magnetic resonance (MR) angiography for thoracic aortic disease and to compare this technique with conventional MR imaging. MATERIALS AND METHODS: One hundred eight consecutive patients underwent 122 examinations, including imaging followed by enhanced angiography. A gradient-echo sequence was used at 1.5 T (116 examinations) 1.0 (6 during infusion of 0.2 mmol/kg gadopentetate dimeglumine. Two independent readers (A B), varied...

To optimize findings at dynamic gadolinium-enhanced hepatic magnetic resonance imaging in the arterial phase, a timing examination was performed after injection of 0.5-mL bolus gadopentetate dimeglumine. In experimental group (n = 28), power used and delay determined each patient on basis results examination. control hand fixed 20-second were used. Arterial-phase examinations (defined as relative liver enhancement not more than 30% peak parenchymal enhancement) successful 26 (93%) patients...

Five patients with renal insufficiency were studied T1-weighted magnetic resonance (MR) imaging before and after intravenous administration of gadopentetate dimeglumine (0.1 mmol/kg) to characterize lesions that detected nonenhanced computed tomography (CT) considered indeterminate. Four demonstrated enhanced gadolinium administration. A total five in these four surgically resected found be cell carcinoma at pathologic examination. The fifth patient was spared surgery because a...

To investigate the effect of magnetic resonance (MR) imaging on negative laparotomy rate (NLR) and perforation (PR) in pregnant patients suspected having acute appendicitis (AA) to assess need for computed tomography (CT) this setting.The data 148 consecutive (mean age, 29 years; age range, 15-42 mean gestational 20 weeks; 4-37 weeks) who were clinically AA examined with MR between March 2002 August 2007 retrospectively analyzed an institutional review board-approved HIPAA-compliant...

Abstract Purpose: To identify and evaluate textural quantitative imaging signatures (QISes) for tumors occurring within the central gland (CG) peripheral zone (PZ) of prostate, respectively, as seen on in vivo 3 Tesla (T) endorectal T2‐weighted (T2w) MRI. Materials Methods: This study used 22 preoperative prostate MRI data sets (16 PZ, 6 CG) acquired from men with confirmed cancer (CaP) scheduled radical prostatectomy (RP). The region‐of‐interest (ROI) was automatically delineated T2w MRI,...

Purpose: By performing registration of preoperative multiprotocol in vivo magnetic resonance (MR) images the prostate with corresponding whole‐mount histology (WMH) sections from postoperative radical prostatectomy specimens, an accurate estimate spatial extent cancer (CaP) on MR imaging (MRI) can be retrospectively established. This could allow for definition quantitative image‐based disease signatures and lead to development classifiers detection MRI. Automated WMH is complicated by...

Significance The normal prostate gland contains the most Zn(II) of all mammalian tissues, and there are marked differences in content between healthy, malignant, benign hyperplastic prostate. Given that multiparametric MRI does not always reliably distinguish these tissue conditions, release ions from response to an external stimulus may prove valuable as a specific biomarker cancer progression. In this work, we show glucose stimulates intracellular stores healthy secretion is reduced...

PURPOSE: To evaluate the feasibility, reproducibility, and technical quality of a dynamic contrast material–enhanced isotropic three-dimensional (3D) volumetric interpolated breath-hold hepatic magnetic resonance (MR) imaging examination. MATERIALS AND METHODS: Fifty patients underwent 3D spoiled gradient-echo (4.2/1.8 [repetition time msec/echo msec]; flip angle, 12°; interpolation in three directions; intermittent fat saturation; pixel size ≤ 2.5 mm all dimensions) before dynamically after...

To evaluate detection and characterization of hepatocellular nodules in fresh whole explanted cirrhotic livers at thin-section magnetic resonance (MR) imaging.T1-weighted spin-echo T2-weighted fast MR imaging (5-mm-thick sections) were performed a head coil 1.5 T the 28 consecutive patients within 4 hours explantation. findings correlated with pathologic examination, new international terminology was used to classify nodules.At 42 suspect (other than regenerative) identified 11 patients....