() : . Computer Tomography Technique Lecture 7:

   ()  : . Computer  Tomography Technique Lecture 7:

() : . Computer

Tomography Technique Lecture 7: CT scan Vertebrals Prepared by: Behzad Ommani Master of Medical Engineering Instructor Radiology Group September, 2012

Lumbar The Lumbar Spine The two commonest reasons for imaging the lumbar spine are: Lumbar disc disease, most commonly at L5/S1 and L4/L5; Spinal stenosis, i.e. narrowing of either or both the spinal canal and lateral recesses

Lumbar Patient position : Supine, Both arms should be raised above the head. This is the planning scan and is usually an anteroposterior (AP) view and lateral. Start position : Zero to symphysis pubis End position : Commence 35 cm Lumbar Protocol

Slice thickness 3-5 mm

Table increment 3-5 mm Algorithm Standard Kilovoltage 120-140 kV mAs per slice 250-400 mAs Scan field of view 48 cm Display field of view 15 cm Window width (WW) 500/1500 Window level (WL) 60/250 Lumbar Disc

Lumbar Stenosis From the lateral scan projection radiograph, plan three axial sections through each disc space, from L5/S1 up to L1/L2, with the middle section passing through the middle of and parallel to each disc space. The axial scans should be 5 mm in thickness and separated using a table increment of 10 mm Lumbar Stenosis

Cervical MR imaging should always be used to investigate cervical disc disease but, due to the lack of signal from bone, it is often very difficult to assess the degree of encroachment on cervical nerve roots from osteophyte formation within the intervertebral foramen. Cervical Spine

Patient position : Supine, Both arms should be raised above the head. This is the planning scan and is usually an anteroposterior (AP) view and lateral. Start position : Zero to 5 cm above orbitomeatal baseline End position : Length, 25 cm Cervical Spine Protocol

Axial scans (helical)

Slice thickness 1-3 mm Table pitch 1-1.5 Algorithm Standard Kilovoltage 120 kV mAs per slice 200-400 mAs Scan field of view 25 cm Display field of view 15 cm Window width 500/1500 Window level 60/250

postnasal space scan Patient position : Supine with head in head cushion on table top Lateral scan projection radiograph is optional Start position Skull base End position : Epiglottis Gantry angle : Parallel to infraorbital meatal line Protocol for postnasal space scan

Slice thickness 5 mm

Table increment 5 mm Kilovoltage 120 kV mAs per slice 250 mAs Algorithm Soft/standard Scan field of view 25 cm Display field of view 22 cm Window width 400 Window level 20

Recently Viewed Presentations

  • Présentation PowerPoint

    Présentation PowerPoint

    Cette présentation PowerPoint se trouve surExplorateur Windows\Temporaire (\\Jaune)\Recherche doc MASTER IPTO. Le «Temporaire»: partage de document, complètement effacé régulièrement
  • Cost and quality measure diagram - IHI

    Cost and quality measure diagram - IHI

    Notes. It is easy to see the quality impact of initiatives that promote health and prevent direct harm to patients; more difficult to get a clean cost measure.. It is easier to have clear cost measure for interventions aimed at...
  • Giants of Population Genetics - duckdna.org

    Giants of Population Genetics - duckdna.org

    Wahlund Effect. The deficiency of heterozygosity that results from treating multiple populations as a single population. Even if the subpopulations themselves are in H-W equilibrium.
  • Lesson 2.2 Ocean Floor - Ms. Woodard's Marine Science Class

    Lesson 2.2 Ocean Floor - Ms. Woodard's Marine Science Class

    Ocean Zones: Hortizontal: Intertidal Zone: area closest to shore, covered during high tide and exposed to air during low tide . Neritic Zone: extends from the intertidal zone to the continental shelf . Oceanic Zone: extends from the continental shelf...
  • What are microsatellites?

    What are microsatellites?

    How many beans make five? Genetic diversity analysis and taxonomy in the legume Ononis Jane Kloda Dr D MacDonald, Dr PGD Dean and Dr S Mayes Morphology Morphology Morphology Geography Cytology Flow Cytometry Taxonomy Aims How many groups are British...
  • Introducing the Accessible Image Sample Book Suzy Haines,

    Introducing the Accessible Image Sample Book Suzy Haines,

    When Alt Text Alone Won't Do. IMAGE: Four very complex diagrams are shown: Photosynthesis line graph with four sets of data; thylakoid lumen effects diagram; chemical structure, meiosis process. 6/27/2011. Digital Image and Graphics Resources for Accessible Materials
  • A gut (microbiome) feeling about the brain

    A gut (microbiome) feeling about the brain

    A gut (microbiome) feeling about the brain. Presented by Eugene Hinderer. Brilliant title ripped from Sherwin et. al 2016. Today I'll be talking about how the microbial composition of our intestines can affect the brain and behavior.
  • Paradoxes

    Paradoxes

    Creator: Salvador Dalí, Spanish, 1904-1989 Title: The Persistence of Memory Work Type: Painting Date: 1931 Material: Oil on canvas Measurements: 9 1/2 x 13" (24.1 x 33 cm)