Diffusion-weighted MRI compared to FDG PET/CT for assessment of early treatment response in lymphoma.

Background: 18F fluoro-deoxyglucose (FDG) positron emission tomography / computed tomography (PET/CT) is a well-recognized diagnostic tool used for staging and monitoring of therapy response for lymphomas. During the past decade diffusion-weighted (DW) magnetic resonance imaging (MRI) is increasingly being included in the assessment of tumor response for various cancers.

Purpose: To compare the change in maximum standardized uptake value (ΔSUVmax) from FDG PET/CT with the change in apparent diffusion coefficient (ΔADC) from DW MRI after initiation of the first cycle of chemotherapy in patients with Hodgkin's lymphoma (HL) and in patients with diffuse large B-cell lymphoma (DLBCL).

Diagnostic accuracy of computed tomography and histopathology in the diagnosis of usual interstitial pneumonia.

Background: The relative clinical benefit of histopathology and computed tomography (CT) in patients with idiopathic interstitial pneumonia (IIP) is under debate.

Purpose: To analyze thin-section CT features and histopathologic findings in patients with usual interstitial pneumonia (UIP) in the clinical context of idiopathic pulmonary fibrosis (IPF), and to evaluate and compare diagnostic accuracy of the two methods among patients with an appropriate spectrum of IIP.

Material And Methods: The study included 91 patients (49 men; mean age 53.

Enhancement characteristics of lymphomatous lymph nodes of the neck.

Background: Previous studies of computed tomography (CT) enhancement of lymphomatous lymph nodes suggest that these nodes might have lower post contrast attenuation values than normal lymph nodes. We have previously found that the contrast medium enhancement curves of lymphomatous lymph nodes of the neck had significantly lower enhancement than those of presumably normal lymph nodes.

Purpose: To prospectively compare CT contrast medium enhancement curves of a homogeneous population of 28 patients with lymphomatous lymph nodes of the neck with 20 controls; to compare enhancement curves before and after successful treatment and to compare nodes with Hodgkin lymphoma (HL) and nodes with non-Hodgkin lymphoma (NHL).

Chest abnormalities in juvenile-onset mixed connective tissue disease: assessment with high-resolution computed tomography and pulmonary function tests.

Background: Mixed connective tissue disease (MCTD) is associated with several chest manifestations. Only a few studies have focused on chest manifestations in juvenile-onset MCTD (jMCTD), and the true prevalence of pulmonary abnormalities on high-resolution computed tomography (HRCT) in these patients is unknown.

Purpose: To investigate the occurrence of pulmonary abnormalities in jMCTD with particular reference to interstitial lung disease (ILD), and to evaluate a possible association between pulmonary findings and disease-related variables.

Conventional sinus radiography compared with CT in the diagnosis of acute sinusitis.

Objectives: To evaluate the value of plain film radiography in a prospective investigation of patients with clinical suspicion of acute sinusitis, using standard CT as a gold standard.

Methods: 47 consecutive patients were examined. Each patient underwent conventional X-ray and standard dose CT examinations on the same day.

A new low-dose CT examination compared with standard-dose CT in the diagnosis of acute sinusitis.

A low-dose CT of the paranasal sinuses was designed with few, thin sections, non-uniform intersection gaps, low milliampere settings and avoidance of direct radiation to the eye lens. The low-dose CT was prospectively compared with standard-dose CT in patients with suspicion of acute sinusitis. Forty-seven patients were examined with low-dose CT immediately after standard-dose CT.