OBJECTIVE To study the efficiency of a stiff collar in restricting the instability of anterior atlantoaxial subluxation (AAS). METHODS Twenty two successive patients with an unstable AAS were studied. Lateral view radiographs were taken of the cervical spine in flexion, extension, and neutral positions without a collar, and in full flexion with a custom made stiff collar. RESULTS The collar...

Optical angiography systems based on optical coherence tomography (OCT) require dense sampling in order to maintain good vascular contrast. We demonstrate a way to gain acquisition speed and spatial sampling by using spectral splitting with a swept source OCT system. This method splits the recorded spectra into two to several subspectra. Using continuous lateral scanning, the lateral sampling i...

Perforation of the proximal descending aorta occurred in a patient on intra-aortic balloon pump (IABP) support after emergency coronary intervention for acute myocardial infarction. The IABP catheter was inserted under fluoroscopic guidance into the right femoral artery without difficulty, but after 8 h on IABP support the patient went into shock with a left hemothorax. Emergency surgery was pe...

Optical resolution photoacoustic microscopy (OR-PAM), while providing high lateral resolution, has been limited by its relatively poor acoustically determined axial resolution. Although this limitation has been tackled in recent works by using either broadband acoustic detection or nonlinear photoacoustic effects, a flexible solution with three dimensional optical resolution in reflection mode ...

Locating lung field is a critical and fundamental processing stage in the automated analysis of chest radiographs (CXRs) for pulmonary disorders. During routine examination CXRs, using both frontal lateral CXRs can benefit clinical diagnosis cardiothoracic diseases. However, accurate segmentation fields on still challenging due to blurry boundary poor generalization ability models. Existing dee...

OBJECTIVE To evaluate the utility of oblique chest views in the diagnosis of rib fractures when used as a routine part of the skeletal survey performed for possible physical abuse. METHODS Oblique chest views have been part of the routine skeletal survey protocol at Primary Children's Medical Center since October 2002. Dictated radiology reports since that time were reviewed, and all cases wi...

TOF (Time-of-Flight) technology enables the real-time 3-D surface reconstruction of the current field of view of a TOF camera with a constant lateral resolution. We propose algorithms for the calibration of a TOF camera which in combination with rigidly mounted standard cameras enables the photorealistic 3-D surface reconstruction of the current field of view by registrating the optical centres...