BMS 250 Chapter 1: BMS 250 Chapter 1 Part 6
Document Summary
Radiography- primary method of obtaining an image of a body part for diagnostic purposes. X-rays: form of high energy radiation, penetrates solid structures within the body. They can pass through soft tissue but absorbed by dense tissue(cid:345)teeth, bone, and tumors(cid:346). Film images produced by x-rays passing through soft tissue leave the film lighter in areas where x-rays are absorbed. Hollow organs can be visualized if they are filled with radiopaque(cid:345)substance that absorbs x-rays(cid:346). Sonography: second most commonly used imaging method, also known as an ultrasound. A technician slowly moves a small, handheld device across the body surface. This device produces high frequency ultrasound waves and then receives signals that are reflected from internal organs. Sonography is the method of choice in obstetrics, where a sonogram can visualize the placenta, examine the fetus and evaluate fetal age, position, and development. Sonography avoids harmful effects of x-rays and the equipment is inexpensive and portable.
