Thesis, PlanB (M.S.)--University of Wisconsin--Stout, 1999. / Includes bibliographical references.

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Thesis (M.Tech.: Radiography)-Dept. of Radiography, Durban Institute of Technology, 2005 xxv, 135 leaves ; 30 cm / The portable C-arm image intensifier has been of great value to orthopaedic registrars for many years. One of its common uses in trauma surgery is during controlled reduction of long bone fractures and accurate placement of internal or external fixation devices. Ionising radiation has therefore become a serious occupational hazard for the orthopaedic registrar. A prospective study was conducted in order to quantify the amount of ionising radiation exposure to the hands, thyroid and whole body of orthopaedic registrars during fluoroscopic internal fixation of the lower limbs, and to determine whether these registrars need to be routinely monitored for radiation exposure. The study also quantified the average operative and screening times for internal fixation of the lower limbs. The study provided information regarding the maximum number of internal fixations of the lower limbs that can be performed by the orthopaedic registrar before the maximum dose level to the hands is exceeded.

Thesis (M.Tech.: Radiography)-Dept. of Radiography, Durban Institute of Technology, 2005 xxv, 135 leaves ; 30 cm / The portable C-arm image intensifier has been of great value to orthopaedic registrars for many years. One of its common uses in trauma surgery is during controlled reduction of long bone fractures and accurate placement of internal or external fixation devices. Ionising radiation has therefore become a serious occupational hazard for the orthopaedic registrar. A prospective study was conducted in order to quantify the amount of ionising radiation exposure to the hands, thyroid and whole body of orthopaedic registrars during fluoroscopic internal fixation of the lower limbs, and to determine whether these registrars need to be routinely monitored for radiation exposure. The study also quantified the average operative and screening times for internal fixation of the lower limbs. The study provided information regarding the maximum number of internal fixations of the lower limbs that can be performed by the orthopaedic registrar before the maximum dose level to the hands is exceeded.

This thesis describes the development and applications of a new, high-speed, non-invasive, radiographic method by which the orientational and configurational characteristics of an internal human organ can be determined. The application of the method requires the organ to possess a radiologically recognizable contour seen simultaneously by two X-ray sources. / The method does not rely on the existence of anatomical landmarks or implanted artifacts, neither is any prior information about the general orientation of the contour necessary, nor does the operator need to have stereoscopic acuity. / In the presentation, first the developed algorithm is analyzed then the method is described in terms of general requirements and execution. Subsequent chapters deal with the sensitivity and accuracy considerations and the potential of the technique is demonstrated in a series of simulation experiments showing that the accuracy of the method is basically limited only by the digital process employed. / The practical feasibility of the method is demonstrated in a series of in-vivo experiments involving vertebrae of scoliotic and non-scoliotic subjects. The results of these experiments show that, in the case of vertebral bodies, such characteristics as inclination, torsion, wedge angle and true shape can be routinely determined with an accuracy of about 2 degrees angular and 0.2 cm linear.

Thesis (M.S.)--University of Michigan, Ann Arbor, 1978. / Typescript (photocopy). Includes bibliographical references (leaves 23-24). Also issued in print.

Thesis (M.S.)--University of Michigan, Ann Arbor, 1978. / Typescript (photocopy). eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 23-24).

Thesis (M.S.)--University of Michigan, 1958.

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