Multiplanar spiral CT enterography in patients with Crohn's disease using a negative oral contrast material: initial results of a noninvasive imaging approach.

The aim of this study was to prospectively define the role of multiplanar spiral CT enterography with a new negative oral contrast material for noninvasive assessment of the small bowel in patients with Crohn's disease. Thirty patients with established Crohn's disease prospectively underwent spiral CT enterography at 45-60 min after distension of the small bowel with 1400 ml of a negative oral contrast material (Mucofalk water enema). Spiral CT scans were obtained 50 s after administration of intravenous contrast material with the following parameters: 5-mm collimation; 7.

Bilateral orbital pseudotumour due to Ormond's disease: MR imaging and CT findings.

We present the MRI and CT findings in a 43-year old patient with bilateral orbital pseudotumour due to Ormond's disease.

Multislice CT-image-guided endoscopic sinus surgery using an electromagnetic tracking system.

Our objective was to assess the practicability and accuracy of a computer-assisted multislice CT-guided frameless electromagnetic tracking for endoscopic sinus surgery. Eighty-two patients with various paranasal sinus diseases were evaluated. Prior to surgery, axial multislice spiral-CT scans with 2.

Symptomatic intraspinal synovial cysts of the lumbar spine: correlation of MR and surgical findings.

The purpose of the study was to determine the frequency of associated MR imaging findings in patients with symptomatic lumbar intraspinal synovial cysts, and to correlate MR with surgical findings. MR imaging studies of 18 patients with surgically and histopathologically proven lumbar intraspinal synovial cysts were retrospectively analyzed and correlated with surgical findings. The diameters of the synovial cysts ranged from 10 mm to 28 mm, with a mean of 16 mm.

Helical CT angiography of stent-grafts in abdominal aortic aneurysms: morphologic changes and complications.

Transfemoral placement of an endovascular stent-graft is increasingly be-ing used as an alternative to surgical repair in the treatment of abdominal aortic aneurysm, especially in high-risk patients. However, complications frequently occur after stent-graft placement. Helical computed tomographic (CT) angiography is a fast, minimally invasive procedure that is quickly becoming the imaging modality of choice for assessment of these complications.

Drop metastases in a patient with a chondroid chordoma of the clivus.

Metastasising chordomas are extremely rare and only four cases with drop metastases have been reported. We report a patient with an intracranial chondroid chordoma, typically involving the clivus, treated by repeated resection, percutaneous transluminal embolisation and radiosurgery. During follow-up with MRI asymptomatic intradural drop metastases were observed throughout the spine, with transgression of the intervertebral foramen, forming a "dumbbell".

Chronic spinal subdural haematoma associated with intracranial subdural haematoma: CT and MRI.

Chronic spinal subdural haematoma is a uncommon. We describe the CT and MRI appearances of chronic spinal and intracranial subdural haematomas following minor trauma. The aetiology, pathogenesis and differential diagnosis are discussed.

High-resolution CT findings in Wilson-Mikity syndrome: a case report.

Wilson-Mikity syndrome (WMS), an uncommon cause of respiratory distress presenting after birth, is radiologically characterised by varying degrees of interstitial thickening and bilateral cyst-like foci of hyperinflation. Aetiology and pathogenesis are still unknown. There are few reports of WMS in the paediatric literature and none describing the features and value of high-resolution CT.

Multiphasic helical CT in diagnosis and staging of hilar cholangiocarcinoma.

Objective: The purpose of our study was to assess the potential of thin-section multiphasic helical CT in diagnosis and staging of hilar cholangiocarcinomas.

Subjects And Methods: Identically collimated helical CT studies were performed before and during the hepatic artery dominant phase and during the portal vein dominant phase of contrast enhancement in 29 consecutive patients with proven hilar cholangiocarcinomas. Differences in attenuation between the tumor and the liver were calculated in each case by subtracting the average attenuation of the tumor from that of the liver.

Adrenal adenomas and nonadenomas: assessment of washout at delayed contrast-enhanced CT.

Purpose: To measure the changes in wash-in and washout of contrast material on contrast material-enhanced computed tomographic (CT) scans in patients with adrenal adenomas and nonadenomas.

Materials And Methods: One hundred twenty-two patients with 135 adrenal masses (74 adenomas, 61 nonadenomas) underwent helical CT. Unenhanced CT was followed by enhanced CT at 30, 60, and 90 seconds and 3, 10, and 30 minutes.

Basilar tip aneurysm: endovascular treatment with Guglielmi detachable coils--midterm results.

Purpose: To determine the safety and effectiveness of Guglielmi detachable coils in the endovascular treatment of ruptured and nonruptured basilar tip aneurysms.

Materials And Methods: A basilar tip aneurysm was occluded with Guglielmi detachable coils in 21 patients. The aneurysmal diameter was small (less than 12 mm) in 15 patients, large (12-25 mm) in four patients, and giant (more than 25 mm) in two patients.

Posttraumatic extracranial aneurysm of the internal carotid artery: combined endovascular treatment with coils and stents.

We report a case of a posttraumatic extracranial pseudoaneurysm of the internal carotid artery that was treated successfully via embolization with Guglielmi detachable coils and placement of a Wallstent after surgical repair failed.

Quantification of area at risk during coronary occlusion and reperfusion by means of MR perfusion imaging.

Purpose: Considerable clinical interest has focused on the size of ischemic myocardium. Fast MR imaging in conjunction with MR contrast media has the potential to identify hypoperfused and infarcted myocardium. This study used MR perfusion imaging to detect and quantify reperfused ischemic myocardium during a brief coronary occlusion and reperfusion, and to characterize the spatial extent of ischemic and reperfused ischemic myocardium relative to the "true" size of the area at risk as defined in histochemical morphometry at post mortem.

Multiphasic helical CT of the kidney: increased conspicuity for detection and characterization of small (< 3-cm) renal masses.

Purpose: To evaluate the potential of thin-section multiphasic helical computed tomography (CT) in the detection and characterization of small (< 3.0-cm) renal masses.

Materials And Methods: Identically collimated helical CT of the kidney was performed before and after administration of contrast material in 93 patients with small renal masses.