1 / 11

MAMOGRAPHY

MAMOGRAPHY. Mammographic Unit. Applications. SCREENING: Systematic examination of a target asymptomatic population (typically females between 40 and 60 years old) with the aim of early diagnostic of breast lesions. .

meir
Download Presentation

MAMOGRAPHY

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. MAMOGRAPHY ENG.AHMED MASRI ENG KHALED AWAD

  2. Mammographic Unit ENG.AHMED MASRI ENG KHALED AWAD

  3. Applications SCREENING:Systematic examination of a target asymptomatic population (typically females between 40 and 60 years old) with the aim of early diagnostic of breast lesions. BIOPSY:three-dimensional localisation of the lesion and tissue hystologic exam. The new version is ready for installation a stereotactic biopsy device. The isocentric arm and the the complete set of accessories make this unit perfect for advanced diagnostics. ENG.AHMED MASRI ENG KHALED AWAD

  4. X-RAY TUBE COLLIMATOR COMPRESSOR CONSOLE BUCKY C-ARM COLUMN ENG.AHMED MASRI ENG KHALED AWAD

  5. A mammography equipment, like all other x-ray units, has two main components: a Generator and an x-ray Tube.The High Voltage Generator transforms low voltage (200 – 240 V) into high voltage (20 – 40 kV) to feed the x-ray Tube.The x-ray Tube needs this high voltage to generate the x-ray photons (x - radiation) ENG.AHMED MASRI ENG KHALED AWAD

  6. HF generator IS RECOMENDET • HF Generator (25 -50)kHz: Dose reduction and high stability of radiological parameters • Residual ripple < 2%: optimal radiation quality • kV range (20-40)KV: most clinical studies have proven that the kV range that gives the best contrast for breast tissues is in the range of 26-28kV • Maximum dose mAs: to guarantee the examination of large breast • Max current mA: To achieve short exposure times and minimal motion artefacts ENG.AHMED MASRI ENG KHALED AWAD

  7. X-ray tube • Molybdenum (Mo) anode and Beryllium window • Ultra-fine focal spots • Standard Molybdenum filter, or automatic selection of Molybdenum/Rhodium filter • High heat storage capacity ENG.AHMED MASRI ENG KHALED AWAD

  8. the compression device A stiff compression device which is parallel to the film surface should be utilised. The sharp posterior angle of the compression paddle allows the compression device to grip the posterior aspect of the breast tissue during operation. This enables improved visualisation of the posterior aspect of the breast. ENG.AHMED MASRI ENG KHALED AWAD

  9. Moving grids (BUCKY) designed for mammography are thinner than convention grids and have carbon fibre inter space material. All the new mammography X-ray machines contain these grids mounted in a reciprocating Bucky mechanism, to make the grid lines invisible. ENG.AHMED MASRI ENG KHALED AWAD

  10. Automatic Exposure Control • Manual technique:kV and mAs are set by the operator • ONE point technique: kV is set by the operator; mAs are automatically controlled depending on the breast thickness and density • ZERO points technique:all the parameters (kV and mAs) are automatically calculated in real time by the system depending on the breast thickness and density • Linearity : a good AEC must guarantee a high linearity of the film density over a wide range of subjects. • Reproducibility : to guarantee highly comparable exams • Automatic Filter selection:the AEC can automatically select the most suitable filter material (Molybdenum or Rhodium) for the examined patient ENG.AHMED MASRI ENG KHALED AWAD

  11. Stereotactic biopsy 3-dimensional Lesion localisation and tissue drawing for hystologic exams • Two exposures with projection at symmetric angles (+/-15°) • Computer calculation of the depth of the lesion (Z-axis) • automatic needle positioning along the three spatial axis X, Y, Z • Tissue drawing by needle aspiration ENG.AHMED MASRI ENG KHALED AWAD

More Related