RAD 372 CH20 bone densitometry and radiation therapy

bone densitometry

what assesses low bone mass and structural deterioration?

osteoporosis

low bone mass and structural deterioration is known what?

bone mineral density (BMD)

what does bone densitometry measure?

dual energy x-ray absorptiometry (DXA)

what measures the amount of bone in soft tissue?

z-score

what compares the patients score with same age and sex?

t-score

what compares patients score with the average young (30) same sex BMD?

t-score

what scoring is most commonly used?

-1.0

what is considered normal for a T-scores?

-1.0 but > -2.5

what is considered Osteopenia for a T-scores?

-2.5

what is considered Osteoporosis for a T-scores?

normal

a T-score of greater than or equal to -1.0 is considered what?

osteopenia

a T-score of less than or equal to -1.0 but greater than -2.5 is considered what?

osteoporosis

a T-score of less than or equal to -2.5 is considered what?

radiation therapy

what is for treatment rather than diagnosis?

radiation therapy

what uses ionizing radiation to treat cancer?

external beam, brachytherapy

what are some types of radiation therapy?

external beam

what has a linear accelerator?

linear accelerator

what produces a high energy x-ray beam?

Image Guided Radiation Therapy (IGRT)

what is a type of external beam radiation therapy?

brachytherapy

what places sealed radioactive isotopes in tissue?

brachytherapy

what allows high-dose directly to diseased tissue?

diseased tissue

brachytherapy places sealed radioactive isotopes in where?