{'fraction_non_alphanumeric': 0.03592814371257485, 'fraction_numerical': 0.0025662959794696323, 'mean_word_length': 5.223404255319149, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Design, evaluation, and use of a temporomandibular arthrometric cephalostat, the Porta-Stat (an x-ray subsystem). Part I. Design and evaluation.

AbstractThis paper describes a light-weight, portable cephalostat (Porta-Stat) designed for transcranial TMJ x-rays. The paper discusses device design and an evaluation to verify cephalostat accuracy.The cephalostat uses a mainframe to which the image receptor, the head, and x-ray source are referenced for standardization of image and magnification distortion in TMJ x-rays. A template is used to define device settings for obtaining the least obstructed oblique view of the TMJ structures. The template is overlaid on a lateral cephalometric x-ray to define device settings for head pitch and x-ray source coordinate position for individualizedand standardized temporomandibular joint radiographs.To verify the accuracy of the Porta-Stat TMJ device, a Porta-Stat “test”group was compared with a fixed cephalostat “control” group for image reproducibility. T-test showed no statistically significant mean difference at the 0.05 level between the two groups. The Porta-Stat cephalostat has verified accuracy essentially...