European radiology
-
Comparative Study
Simple models improve the discrimination of prostate cancers from the peripheral gland by T1-weighted dynamic MRI.
Evaluation of the accuracy of descriptive and physiological parameters calculated from signal intensity-time curves using T1-weighted dynamic contrast enhanced MRI (DCE MRI) to differentiate prostate cancers from the peripheral gland. Twenty-seven patients with prostate cancers were examined with DCE MRI prior radical prostatectomy. Regions of interest were defined in tumors and non-affected areas in the peripheral zone. ⋯ VD was higher in tumors than in the non-affected peripheral prostate (P=0.05). However, none of the dynamic parameters in carcinomas showed a significant correlation with VD or Gleason score. Although pharmacokinetic modeling in DCE MRI showed potential to discriminate prostate cancers from peripheral prostate tissue, descriptive parameters of the early signal enhancement after contrast media injection reached higher sensitivity and specificity.
-
Comparative Study
Traumatic injuries of the pelvis and thoracic and lumbar spine: does thin-slice multidetector-row CT increase diagnostic accuracy?
The objective is to evaluate different multidetector-row CT (MDCT) strategies for adequate classification of spinal and pelvic injuries. Seventy intubated patients after multiple trauma underwent conventional radiography (CR) and MDCT. Examinations included the pelvis (P), the lumbar spine (LS) and the thoracic spine (TS). ⋯ Fractures were identified by CT3R in 100% of cases, by CT5R in 95%, by CT3 in 90% [P]-100% [TS], by CT5 in 83.3% [LS]-90% [P] and by CR in 57.1% [TS]-87.2% [P]. Unstable fractures were identified in 100% by CT3R, CT5R and CT3, 85.7% [TS]-100% [P/LS] by CT5 and 57.1% [TS]-80% [P] by CR. Only overlapping thin-slice multiplanar reformation allows for an adequate classification of spinal and pelvic injuries and thus is highly emphasized in patients after severe blunt trauma.
-
The aim of this retrospective study was to emphasize the performances of spiral CT (HCT) and multidetector-row CT (MDCT) as very effective imaging modalities for the diagnosis of intestinal perforations caused by calcified alimentary foreign bodies. Eight sites of perforations of the ileum by ingested foreign bodies were found in seven patients--one patient presenting with two separate sites of perforation. The diagnosis was successfully made by HCT in four patients and MDCT in the remaining three. ⋯ In each patient, this identification was only possible thanks to the scrupulous analysis of very thin overlapping reconstructions obtained not only in the perforation sites (6/8 sites), but also through the entire abdomen (2/8 sites). Our report emphasizes the high performances of CTA and MDCT in identifying intestinal perforation caused by calcified alimentary foreign bodies. Moreover, the high specificity of the CT diagnosis made it possible to avoid surgerical exploration in three patients.
-
When attempting a literature review on contrast-enhanced ultrasound (CEUS) in trauma, very few articles are found. There are a large number of papers dealing with FAST (focused assessment with sonography in trauma) which, in practice, is the definition for detection of free fluid in the abdomen, but there are papers covering assessment of parenchymal damage with non-enhanced ultrasound. This review focuses on direct assessment of parenchymal damage in blunt abdominal trauma, and includes papers on non-enhanced ultrasound to give a historical background to scientific approaches to ultrasound diagnosis of parenchymal injury. A report on our local experience of CEUS in trauma has also been included.
-
Comparative Study
3D imaging with an isocentric mobile C-arm comparison of image quality with spiral CT.
The purpose of this study was to evaluate the image quality of the new 3D imaging system (ISO-C-3D) for osteosyntheses of tibial condylar fractures in comparison with spiral CT (CT). Sixteen human cadaveric knees were examined with a C-arm 3D imaging system and spiral computed tomography. Various screws and plates of steel and titanium were used for osteosynthesis in these specimens. ⋯ Titanium implants caused the smallest number of artifacts. The image quality of ISO-C is inferior to CT, and metal artifacts were more prominent, but the clinical value was equal. ISO-C-3D can be useful in planning operative reconstructions and can verify the reconstruction of articular surfaces and the position of implants with diagnostic image quality.