How to Improve the Conspicuity of Breast Tumors on Computed High b-value Diffusion-weighted Imaging.

Purpose: The aim of this study was to compare the tumor conspicuity on actual measured diffusion-weighted images (aDWIs) and computed DWI (cDWI) of human breast tumors and to examine, by use of a phantom, whether cDWI improves their conspicuity.

Materials And Methods: We acquired DWIs (b-value 0, 700, 1400, 2100, 2800, and 3500 s/mm) of 148 women with breast tumors. cDWIs with b-values of 1400, 2100, 2800, and 3500 s/mm were calculated from aDWI scans where b = 0 and 700 s/mm; the tumor signal-to-noise ratio (SNR) was compared at each b-value.

[Differentiation between Hepatic Focal Lesions and Heterogenous Physiological Accumulations by Early Delayed Scanning in F-FDG PET/CT Examination].

Purpose: We examined whether early delayed scanning is useful for differentiation of liver lesion and heterogenous physiological accumulation in positron emission tomography (PET) examination.

Methods: The subjects of the study were 33 patients with colorectal cancer who underwent PET examination and were added early delayed scanning to distinguish between liver lesions and heterogenous physiological accumulation to conventional early images. We placed same regions of interest (ROI) in the tumor and hepatic parenchyma for early delayed and conventional early images.

[Experience of using a filmless system in dental practice at Hiroshima University Hospital, a former university dental hospital].

Our university hospital has had a policy of electronic patient recordkeeping, replacing paper-based recordkeeping, since September 1, 2008. Because the Department of Oral and Maxillofacial Radiology had already been using computed radiography for X-ray systems except for intraoral radiography and storing data in Digital Imaging and Communications in Medicine (DICOM) format, the following three conditions form the basis of the changes we made in relation to the introduction of this policy. We started 1.

Validation of dental panoramic radiography measures for identifying postmenopausal women with spinal osteoporosis.

Objective: Measurements of mandibular inferior cortical shape and width detected on dental panoramic radiographs may be a useful screening tool for spinal osteoporosis in postmenopausal women. The purposes of this study were to clarify whether these measures are validated compared with simple screening tools based on questionnaires, such as the osteoporosis self-assessment tool (OST) and whether these measures can be used in postmenopausal women with histories of hysterectomy, oophorectomy, or estrogen use.

Subjects And Methods: We calculated the diagnostic performances of panoramic measurements and the OST for identifying women with spinal osteoporosis in both 159 healthy postmenopausal and 157 postmenopausal women with histories of hysterectomy, oophorectomy, or estrogen use.