MEDRADSC 3G03 Lecture Notes - Lecture 20: Femur, Trochanter, Christian Apologetics And Research Ministry
20 Dec 2017
School
Department
Course
Professor
Document Summary
Osteoporosis (cid:862)is a s(cid:455)ste(cid:373)i(cid:272) skeletal disease characterized by low bone mass and microarchitectural deterioration of bone tissue, with a consequent increase in bone fragility and susceptibility to f(cid:396)a(cid:272)tu(cid:396)e. (cid:863) Bone density testing is done for three reasons: to diagnose osteoporosis, to predict fracture risk, how much more risk do you have in compared to normal person, to monitor therapy, see how patient is responding to treatment. Less scatter: perpendicular beam, no divergence, image geometry. Fan beam: faster scan times, divergence compensation. Identify joint spaces: label vertebrae, automatic calculations, total proximal femur, femoral neck, trochanter, forearm, distal 33% of radius measured. If hip or spine cannot be measured- prosthesis, spinal fusion, (cid:272)a(cid:374)"t la(cid:455) flat o(cid:374) ta(cid:271)le: very obese. Positioning is critical: must be precise for accurate measurement, must be exactly the same for further comparative studies, same mask used so that parameters are identical, must be repeatable year to year. Two sta(cid:374)dards are used to (cid:272)o(cid:373)pare pt"s (cid:271)o(cid:374)e de(cid:374)sity (cid:373)easure(cid:373)e(cid:374)t.
