BACKGROUND AND PURPOSE:Blood flow in an intracranial stent cannot be visualized with 3D time-of-flight MR angiography owing to magnetic susceptibility and radiofrequency shielding. As a novel follow-up tool after stent-assisted coil embolization, we applied MRA by using a Silent Scan algorithm that contains an ultrashort TE combined with an arterial spin-labeling technique (Silent MRA). The purpose of this study was to determine whether Silent MRA could visualize flow in an intracranial stent placed in the anterior circulation.

The X-ray radiographic testing method is often used for detecting weld defects as a non-destructive testing method (N DT) . Dueto the difficulties in identifying small defects from the X-ray film, skilled laborers should be trained. However Characteristic of X-ray Film Image Relations between weld bead and X-ray film im'age.1

No abstract

An autonomous mobile robot that can move autonomously in a horizontalpipe, a verticalpipe and an elbow joint with bending angle of 90 . Furthermore, the robot has a vision sensor and an operating arm in front of the robot body, and accordingly it has functions to execute piping operations, such as inspection of pipe surface, welding of the pipes and so on. The robot is constructed by several units with four wheels connected by universal joints each other. The robot is controlled by a host personal computer and one-chip microcomputers. As the results of operating experiments, the effectiveness of the robot system in autonomous movement in a pipe and an elbow joint and automatic tracking of a welding line was confirmed.

A 61-year-old man presented with a rare pleural malignant mesothelioma of the spine manifesting as progressive weakness of the bilateral lower extremities, numbness in the body and both legs, and dysfunction of the bladder and bowel. He had previous occupational exposure to asbestos while working at a car repair shop and had undergone right panpleuropneumonectomy under a diagnosis of sarcomatous type mesothelioma in the right pleural space. Magnetic resonance imaging of the spine with gadolinium showed an enhanced intramedullary tumor at the T4 level. Operative findings disclosed the clouded and swollen right posterior nerve root, and the pial surface was covered by clouded arachnoid-like membrane. The removed part of the T4 posterior nerve root and intramedullary tumor revealed malignant mesothelioma with invasion spreading along the posterior nerve root. He died of respiratory failure 3 months after the diagnosis. This case shows that spinal metastasis must be considered if a patient with pleural malignant mesothelioma shows neurological worsening and neuroimaging shows an abnormal lesion in the thoracic spinal cord. However, the patient's neurological condition is very difficult to improve in the presence of spinal cord infiltration.