Measurement of the height difference between right and left hemi diaphragm in normal Sudanese adult using postero-anterior chest Measurement

Abstract

The following thesis is about an assessment of medical ultrasound resolution using polymer gel. The study has been done at faculty of x-ray science .During a period of time extended from may2012 till January2013. Using four sample of known companies in medical instruments (Siemens-Aloka-Philips-Shimadzu).The study evaluate axial resolution and lateral resolution versus aging of ultrasound systems, and maximum depth visualization for different types of ultrasound probes (different frequencies 4mhz-7mhz).The data has been analyzed by excel and it revealed that Philips system were showing the most tolerable ones in view of life change and aging influence. The study revealed that Siemens system showed the most influencing one by aging and the average shiftiness was 1.8 mm, then Aloka showed 1.3 mm, then Shimadzu showed 0.8 mm and the last influencing system by aging was Philips which showed 0.7 mm..The study revealed that the vertical shift for the system Siemens, Aloka, Shimadzu and Philips were as follows: 1, 0.8, 0.6 and 0.6 mm respectively. The study revealed that lateral resolution for the systems Siemens, Aloka, Shimadzu and Philips were as follows 0.9, 0.7, 0.5 and 0.2 mm respectively. The study revealed that maximum depth of visualization increase at low frequencies Probes while the shallow visualized depth related to high frequencies Probes, a probe of 4 MHz visualized depth was 16 cm and 7 MHz probe visualized depth was 15 cm.