The purpose of this study was to describe our experience with Gd-DTPA-enhanced MR imaging in the evaluation of the most common nasopharyngeal tumors. Forty-two patients with tumors of the nasopharynx and adjacent spaces had MR imaging before and after IV injection of Gd-DTPA. Images were obtained with a 1.0-T superconducting magnet imaging system in transverse, coronal, and sagittal planes with...

UNLABELLED Radioimmunotherapy (RIT) can be performed with various radionuclides. We tested the stability, biodistribution, and therapeutic efficacy of various radioimmunoconjugates ((131)I, (88/90)Y, (177)Lu, and (186)Re) of chimeric antirenal cell cancer monoclonal antibody G250 (mAb cG250) in nude mice with subcutaneous renal cell cancer (RCC) tumors. METHODS The (88/90)Y and (177)Lu labeli...

To develop an estimation method of gadolinium magnetic resonance imaging (MRI) contrast agents, the effect of concentration of Gd compounds on the ESR spectrum of nitroxyl radical was examined. A solution of either 4-oxo-2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPONE) or 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPOL) was mixed with a solution of Gd compound and the ESR spectrum was reco...

A study of glomerular filtration rate estimation by cockcroft-gault, mdrd and ckd-epi formula in comparison with dtpa renal scan – a comparative study among live related kidney donors in south india. a b c Original Article BACKGROUND: Renal function assessment is the most important part of donor evaluation. The Glomerular Filtration Rate (GFR) is considered to be optimal test for overall assess...

Although paramagnetic contrast agents have a wide range of applications in medical studies involving magnetic resonance imaging (MRI), these agents are seldom used to enhance MRI images of plant root systems. To extend the application of MRI contrast agents to plant research and to develop related techniques to study root systems, we examined the applicability of the MRI contrast agent Gd-DTPA ...

-Introduction: Hepatocellular carcinoma (HCC) develops against a background of cirrhosis by a multi-step dedifferentiation process from regenerative nodules to dysplastic nodules to HCC. Liver transplantation provides the most effective treatment for HCC providing the diagnosis is made at an early stage, but because the liver is structurally abnormal, HCC is often difficult to detect and distin...

OBJECTIVE This article reviews the different technical aspects and pitfalls of gadolinium (Gd)-ethoxibenzyl (EOB)-diethylenetriamine pentaacetic acid (DTPA) and the advantages of the hepatocellular phase (HCP) and defines its specific imaging features of liver lesions. BACKGROUND Gd-EOB-DTPA is a contrast agent with combined properties of a conventional non-specific extracellular and a hepato...

Hypothesis: Delayed Gd(DTPA) enhanced MRI of cartilage (dGEMRIC) is a method designed to image the distribution of fixed charge density in cartilage, based on the premise that mobile ions will distribute in cartilage in relation to the concentration of the charged glycosoaminoglycan (GAG) molecules. The hypothesis to be tested here is whether the variation of T1 values post-Gd is a true reflect...

OBJECTIVE In the literature, there are many reports comparing relative renal function calculated with Tc 99m DTPA and Tc 99m DMSA in adults and children. However, there is no consensus about the results. As there is indeterminacy in the reliability of Tc 99m DTPA for the calculation of the relative renal functions, we retrospectively designed a study to compare the relative renal functions meas...

In an effort to improve on the noninvasive detection of renal artery stenosis, we investigated the effect of angiotensin converting enzyme inhibition on computer-assisted 99mTc-diethylenetriaminepentaacetic acid (DTPA) renal flow studies in a canine model of two-kidney, one clip hypertension and compared these findings with clearances of inulin and p-aminohippuric acid in the stenotic and contr...