Zhonghua Yi Xue Za Zhi
October 2010
Objective: To explore the dynamic magnetic resonance (MR) imaging findings of chromophobe cell renal carcinoma and evaluate its pathological correlation.
Methods: Twelve cases with chromophobe cell renal carcinoma confirmed by surgical pathology underwent MR plain scanning and dynamic enhancement scanning before operation. And the MR data were reviewed and analyzed retrospectively in comparison with surgical and pathological results.
Background: The few studies on MR colonography with air enema involved feasibility of bowel distention and imaging quality and lacked detection sensitivity of colorectal neoplasms. The purpose of this prospective study was to assess the detection sensitivity of colorectal neoplasms with the three-dimensional Fourier transform fast spoiled gradient-recalled MR colonography with air enema.
Methods: A total of 30 patients scheduled for optical colonoscopy due to rectal bleeding, positive fecal occult blood test results or altered bowel habits were recruited and successfully underwent entire colorectal examinations with three-dimensional Fourier transform fast spoiled gradient-recalled MR colonography and subsequent optical colonoscopy on the same day.
Zhonghua Zhong Liu Za Zhi
September 2009
Objective: To investigate the CT and MRI features of peripheral primitive neuroectodermal tumors (pPNETs) and evaluate its diagnostic value.
Methods: The clinicopathological data of 9 surgically treated patients with peripheral primitive neuroectodermal tumors confirmed by pathology were collected, spiral CT (4/9) and MRI (6/9) plain scanning and dynamic enhancement scanning were performed preoperatively. Both CT and MRI scannings were performed in 1 case.
Zhonghua Zhong Liu Za Zhi
February 2007
Unlabelled: OBJECTIVE; To evaluate the clinical value of different CT diagnostic criteria for peripancreatic artery and vein invasion in pancreatic carcinoma through comparison with the findings on surgical exploration.
Methods: Of 72 patients of having suspected pancreatic carcinoma were examined by multiplane spiral CT. Among 43 confirmed by surgical pathology; 15 underwent pancreaticoduodenectomy; 28 were found to have unresectable tumors.
Aim: To compare the gadolinium-enhanced multiphase dynamic magnetic resonance imaging (MRI) and multiphase multirow-detector helical CT (MDCT) scanning for detection of small hepatocellular carcinoma (HCC).
Methods: MDCT scanning and baseline MRI with SE T1-WI and T2-WI sequence combined with FMPSPGR sequence were performed in 37 patients with 43 small HCCs. Receiver operating characteristic (ROC) curves were plotted to analyze the results for modality.
Aim: To investigate the hemodynamic changes in a precancerous lesion model of hepatocellular carcinoma (HCC).
Methods: Hemodynamic changes in 18 Wistar rats were studied with non-invasive magnetic resonance (MR) perfusion. The changes induced by diethylnitrosamine (DEN) developed into liver nodular lesions due to hepatic cirrhosis during the progression of carcinogenesis.
Objectives: To analyze the MRI manifestations and pathological changes of hepatocellular carcinoma (HCC) after transcatheter arterial chemoembolization (TACE) with lipiodol.
Methods: 23 patients with 31 HCC lesions treated by TACE underwent MRI examination within 1 week before their surgical resections. MRI was performed with SE sequence (T1WI and FSE T2WI) and FMPSPGR sequence dynamic multi-phase contrast scans.
Cardiovasc Intervent Radiol
March 2006
Three-dimensional contrast-enhanced magnetic resonance venography (CE MRV) is a sensitive and accurate method for diagnosing vena cava pathologies. The commonly used indirect approach involves a nondiluted gadolinium contrast agent injected into an upper limb vein or, occasionally, a pedal vein for assessment of the superior or inferior vena cava. In our studies, a coronal 3D fast multi-planar spoiled gradient-echo acquisition was used.
View Article and Find Full Text PDFObjective: To investigate the value of Diffusion-Weighted Imaging (DWI) in the diagnosis of early stage liver diffuse lesions.
Methods: Diethylnitrosamine (DEN) was used to induce liver lesions in rats. Sequential DWI studies were performed on the livers from 1 to 14 weeks after DEN was administered through drinking water.
J Cancer Res Clin Oncol
September 2005
Purpose: To investigate the serial changes of the hepatic metabolites in a chemical-induced rat model of hepatocellular carcinoma (HCC) in vivo by a clinical 1.5 T MR scanner.
Methods: Diethyl nitrosamine (DEN) induced HCC model rats (n=60) and control rats (n=20) were included.
Aim: To determine the validity of the non-invasive method of CT perfusion (CTP) in rat model of hepatic diffuse disease.
Methods: Twenty-eight Wistar rats were divided into two groups. Liver diffuse lesions were induced by diethylnitrosamine in 14 rats of test group.
Background: The diagnosis of diffuse hepatic lesions in early stage is a tough task at any time for clinical conventional imaging. Magnetic resonance diffusion-weighted imaging (MR DWI) can detect the changes of tissue structure at molecular level. This study was designed to determine the value of DWI in the diagnosis of diffuse liver lesions in early stage.
View Article and Find Full Text PDFObjective: To assess the accuracy of three-dimensional contrast-enhanced magnetic resonance angiography (3D CE MRA) in evaluating the portal vein involvement in patients with hepatocellular carcinoma.
Methods: Ninety patients with hepatocellular carcinoma underwent 3D CE MRA of the portal venous system, using a high-field 1.5 T MR machine and a body coil and using Gd-DTPA as contrast material, before hepatic surgery or interventional therapy.
Objective: To establish preliminarily the different diagnostic criteria for peripancreatic arterial and venous invasion in pancreatic carcinoma by comparing their multidetector-row computed tomography (MDCT) appearances with surgical exploration.
Methods: Among 101 patients with pancreatic carcinoma examined by MDCT, 54 candidates accepting surgery were preoperatively evaluated for vascular invasion based on CT signs (A-E): arterial embedment in tumor or venous obliteration; tumor involvement exceeding one-half of the circumference of the vessel; vessel wall irregularity; vessel caliber stenosis; teardrop superior mesenteric vein (SMV). The peripancreatic major vessels (n = 224) were examined carefully by surgeons during the operation.
World J Gastroenterol
June 2004
Aim: To evaluate the value of postprocessing techniques of CT colonography, including multiplanar reformation (MPR), virtual colonoscopy (VC), shaded surface display (SSD) and Raysum, in detection of colorectal carcinomas.
Methods: Sixty-four patients with colorectal carcinoma underwent volume scanning with spiral CT. MPR, VC, SSD and Raysum images were obtained by using four kinds of postprocessing techniques in workstation.
Hepatobiliary Pancreat Dis Int
May 2004
Background: Multirow-detector helical CT (MDCT) allows faster Z-axis coverage and improves longitudinal resolution to scan the entire liver. This study was to evaluate the value of multiphase hepatic CT scans using MDCT in diagnosing hypervascular hepatocellular carcinoma (HCC).
Methods: Multiphase hepatic CT scans in 40 patients were carried out with a Marconi Mx8000 MDCT scanner.
Objective: To investigate the value of multislice spiral computed tomography (MSCT) in demonstrating the relationship between bronchus and peripheral lung cancer.
Methods: We prospectively performed volumetric targeted scans of 0.5 mm collimation with MSCT and reconstructed images of multiplanar reconstruction (MPR), curved multiplanar reformations (CMPR) and surface shaded display (SSD) in 53 peripheral lung cancers.
Objective: To evaluate the value of MR dynamic Gadolinium-enhanced fast multiplanar spoiled gradient-echo (FMPSPGR) and spin-echo (SE) T1-weighted fat-suppressed techniques in the diagnosis of pancreatic carcinoma.
Methods: Eighteen cases of pancreatic carcinoma verified by surgical and pathologic results were examined by MR, and the MR sequences included SE T1WI, FSE T2WI, SE T1-weighted fat-suppressed and dynamic Gadolinium-enhanced FMPSPGR.
Results: Of 18 pancreatic carcinomas, 10, 6, and 2 tumors showed respectively hypo-intensity, iso-intensity and hyper-intensity on SE T1WI, meanwhile, 8, 6, and 4 tumors displayed hyper-intensity, iso-intensity and hypo-intensity on FSE T2WI in comparison with the normal pancreatic tissue.
Hepatobiliary Pancreat Dis Int
August 2002
Objectives: To study prospectively the enhancement features of small hepatocellular carcinoma (SHCC) with multi-phase scanning of dynamic MRI and spiral CT, and discuss the superiority of dynamic MRI to spiral CT.
Methods: Multi-phase dynamic contrast scanning of high field MRI and spiral CT were performed in 53 patients with SHCC. The arterial phase, portal venous phase and delayed phase scanning of spiral CT was done after the pre-contrast scanning of the entire liver.
Hepatobiliary Pancreat Dis Int
February 2002
Objectives: To evaluate the value of the arterial Phase (AP) of biphase enhanced spiral CT (SCT) in the diagnosis of small HCC and to investigate the criteria, initial time, ending time and duration of AP.
Methods: From May 1995 to March 1999, patients with small HCC proved surgically and pathologically including 49 patients (n=53) in group A, 148 (n=186) in group B and 52 (n=52) in group C were collected. Biphase dynamic enhanced SCT scans were performed in all patients of the three groups and additional single-level dynamic scans only done in the group C.
Aim: To evaluate the role of three-dimensional contrast-enhanced magnetic resonance angiography (3D CE MRA) in the diagnosis of Budd-Chiari syndrome (BCS).
Methods: Twenty-three patients with BCS underwent 3D CE MRA examination, in which 13 cases were secondary to either hepatocellular carcinoma (11 cases), right adrenal carcinoma (1 case) or thrombophlebitis (1 case) and 10 suffered from primary BCS. The patency of the inferior vena cava (IVC), hepatic and portal veins as well as the presence of intra- and extrahepatic collaterals, liver parenchymal abnormalities and porto-systemic varices were evaluated.
World J Gastroenterol
October 2003
Aim: To evaluate the role of multiphasic scanning by multirow-detector helical CT (MDCT) in detecting small hypervascular hepatocellular carcinoma (SHCC).
Methods: Multiphasic scanning was carried out in 75 patients with SHCC with Marconi MX8000 CT scanner. The early arterial phase (EAP), late arterial phase (LAP) and the portal venous phase (PVP) scans were started at 21 s, 34 s and 85 s respectively.
Zhonghua Gan Zang Bing Za Zhi
September 2003
Zhonghua Gan Zang Bing Za Zhi
September 2003
Objectives: To evaluate multiphase hepatic CT scan using multidetector row helical CT (MDCT) in detecting hypervascular small hepatocellular carcinoma (SHCC).
Methods: Multiphase hepatic CT scan in 75 patients with SHCC was carried out with Marconi MX8000 multidetector row helical CT scanner. The early arterial phase scan started at the 21th second after the injection of contrast medium, the late arterial phase scan started at the 34th second, and the portal venous phase started at the 80tieth second, six seconds every time.
Zhonghua Gan Zang Bing Za Zhi
September 2003