1 / 9

RAD 354 Chapt . 23 Mammo

RAD 354 Chapt . 23 Mammo. Also know as soft tissue radiography Breast CA is the 2 nd leading cause of cancer related death in women (lung CA is first) 1 in every 8 women will get breast CA. Two types of Mammo. Screening – for asymptomatic patients

alexander-mooney
Download Presentation

RAD 354 Chapt . 23 Mammo

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. RAD 354 Chapt. 23 Mammo • Also know as soft tissue radiography • Breast CA is the 2nd leading cause of cancer related death in women (lung CA is first) • 1 in every 8 women will get breast CA

  2. Two types of Mammo • Screening – for asymptomatic patients • Diagnostic – for symptomatic or elevated risk patients • Baseline mammo is the first mammo done and is usually done prior to the age of 40

  3. Risk factors for Breast CA • Age – the oloder the higher the risk • Family history – mom/sister with breast CA • Genetics – presence of BRCA1/2 genes • Menstruation – onset prior to age 12 • Menopause – after age 55 • Late childbirth age or no kids • Education – higher ed= higher risk • Socioeconomics = higher risk with higher status

  4. Breast anatomy – all SIMILAR atomic mass density! • Fibrous • Glandular – most radiosensitive breast tissue • Adipose – less dense and less dose • If a malignancy is present, it usually presents as a distortion of ductal and connective tissue patterns • 80% is ductal and many have microcalcifications

  5. Imaging breast tissues • Low kVps = 20 – 35 kVp range • Target material is tungsten (W), Molybdenum (Mo) or Rhodium (Rh) • Filter material is dictated by target material • Beryllium or borosilicate • If tungsten target – then molybdenum or rhodium filter • Inherent filtration is approx. 0.1 mm al equiv. • Focal spot sizes 0.3-0.1mm (large/small)

  6. Other mammoinfro • Heel effect is always used (chest wall at cathode side of tube) • Compression always used: increased spatial resolution, lower pt. dose and focal spot blur • Grids are usually 4:1 or 5:1 FOCUSED • AEC’s require reproducible images at low dose kVp’s of +/- 0.1 OD

  7. Mammo Image Receptors • Historically there have been many receptors used (direct-exposure, xeroradiography, screen-film and digital receptors • Current are only screen-film and digital receptors in this country • Digital’s advantage is post image acquisition processing; disadvantage is spatial resolution limitations (pixel size of receptor)

  8. Mammo Unit

  9. Mammo Radiograph

More Related