Inter-crystal scattering event identification using a novel silicon photomultiplier signal multiplexing method.

Identifying the inter-crystal scatter (ICS) events and recovering the first interaction position enables the accurate determination of the line-of-response in positron emission tomography (PET). However, conventional silicon photomultiplier (SiPM) signal multiplexing methods based on two-dimensional (2D) charge-division circuits do not allow the detection of multiple gamma-ray interaction positions in a scintillation array coupled with a SiPM array. In this study, we propose a novel multiplexing method that can restore all the individual channel data from a smaller number of multiplexed channels using high-pass filters and neural networks.

Non-contiguous spinal injury in cervical spinal trauma: evaluation with cervical spine MRI.

Objective: We wished to evaluate the incidence of non-contiguous spinal injury in the cervicothoracic junction (CTJ) or the upper thoracic spines on cervical spinal MR images in the patients with cervical spinal injuries.

Materials And Methods: Seventy-five cervical spine MR imagings for acute cervical spinal injury were retrospectively reviewed (58 men and 17 women, mean age: 35.3, range: 18 81 years).

Renal cell carcinoma: analysis of postoperative recurrence patterns.

Purpose: To retrospectively analyze the recurrence patterns of renal cell carcinoma (RCC) and the factors affecting tumor recurrence.

Materials And Methods: The institutional review board approved this study; patient informed consent was not required. There were 162 men (mean age, 54 years +/- 13 [standard deviation]) and 32 women (mean age, 56 years +/- 11) who had undergone complete surgical resection of RCC.

CT angiography for evaluation of living renal donors: comparison of four reconstruction methods.

Objective: We sought to compare various reconstruction methods for CT angiographic images in evaluating living renal donors.

Materials And Methods: In 76 patients who underwent donor nephrectomy, vascular phase CT data were obtained using an MDCT scanner (detector array, 1.25 mm x 4; beam pitch, 1.

MRI of small cell carcinoma of the uterine cervix with pathologic correlation.

Objective: The purpose of this study was to evaluate the MRI features of small cell carcinoma of the uterine cervix and to correlate those features with pathologic findings.

Conclusion: Small cell carcinoma of the uterine cervix can be characterized by frequent parametrial invasion and extensive lymphadenopathy, although the tumor morphology seems to be nonspecific on MRI.

Intra-articular elastofibroma of the shoulder joint.

A 19-year-old man presented with an elastofibroma in his left shoulder joint. The patient had had limitation of motion in his left arm for 3 years, especially when rotating internally. Radiography of his left shoulder showed bone erosion in the neck of the humerus.