AJR. American journal of roentgenology
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AJR Am J Roentgenol · Mar 2010
Comparative StudyContrast material for abdominal dynamic contrast-enhanced 3D MR angiography with parallel imaging: intraindividual equimolar comparison of a macrocyclic 1.0 M gadolinium chelate and a linear ionic 0.5 M gadolinium chelate.
The purpose of this study was to compare a macrocyclic 1.0 M contrast agent with a linear ionic 0.5 M contrast agent at equimolar dosage in regard to image quality and number of vessel segments visualized at abdominal dynamic contrast-enhanced 3D MR angiography. ⋯ At abdominal contrast-enhanced 3D MR angiography, depiction of small abdominal vessels was significantly better and vessel-to-tissue contrast significantly higher with 1.0 M macrocyclic gadobutrol than with an equimolar dose of 0.5 M linear ionic gadopentetate dimeglumine.
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AJR Am J Roentgenol · Mar 2010
Clinical TrialProspective analysis of the pattern and risk for severe vital sign changes during percutaneous radiofrequency ablation of the liver under opioid analgesia.
The aims of this study were to evaluate the pattern of vital sign changes and to elucidate significant risk factors for severe cardiovascular inhibition caused by percutaneous hepatic radiofrequency ablation (RFA). ⋯ Changes in BP and HR, especially bradycardia, are common during percutaneous RFA of hepatic lesions. Significant risk factors for severe cardiovascular inhibition include contact of the RFA zone with the branches of the central portal vein, old age, and female sex.
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AJR Am J Roentgenol · Mar 2010
Comparative StudyAssessment of tumor recurrence in patients with colorectal cancer and elevated carcinoembryonic antigen level: FDG PET/CT versus contrast-enhanced 64-MDCT of the chest and abdomen.
The purpose of this study was to compare FDG PET/CT and contrast-enhanced 64-MDCT of the chest, abdomen, and pelvis in the detection of tumor recurrence in patients with colorectal cancer and an elevated level of carcinoembryonic antigen (CEA). ⋯ FDG PET/CT has higher sensitivity than MDCT in the identification of sites of recurrent and metastatic disease in patients with colorectal cancer and an elevated CEA level. The two techniques appear to have similar specificity.
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AJR Am J Roentgenol · Mar 2010
Views of radiology program directors on the role of mentorship in the training of radiology residents.
The successful mentoring of resident physicians has been linked to several beneficial outcomes for trainees including increased research productivity, improved career satisfaction, and retention in academics. Female residents may have greater difficulty establishing mentoring relationships than male residents. The purpose of this study was to assess the attitudes of radiology residency program directors toward the subject of mentorship, to determine the prevalence of formal mentoring programs, and to evaluate several issues specifically pertaining to the mentoring of female residents. ⋯ Program directors consider mentoring relationships to be an important resource for resident professional development and a potential resource to increase the proportion of residents pursuing academic careers and positions of leadership. Female residents may have specific mentoring needs that should be explored with further study.
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AJR Am J Roentgenol · Mar 2010
Liver MRI at 3 T using a respiratory-triggered time-efficient 3D T2-weighted technique: impact on artifacts and image quality.
The purpose of this retrospective study was to qualitatively and quantitatively compare image quality of a time-efficient 3D T2-weighted sequence-the sampling perfection with application-optimized contrasts using different flip angle evolutions (SPACE) sequence-with a standard 2D T2-weighted turbo spin-echo (TSE) sequence for liver imaging at 3 T. ⋯ For T2-weighted liver imaging at 3 T, the respiratory-triggered SPACE sequence shows better image quality with near elimination of motion and pulsation artifacts and improved tissue contrast than the breath-hold 2D TSE sequence, but suffers from increased B(1) inhomogeneity artifact and longer scanning time.