Sep 30 – Oct 3, 2007 University of Florida (UF) Hilton...
Transcript of Sep 30 – Oct 3, 2007 University of Florida (UF) Hilton...
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Implementation Of Salivary Glands In The Bodybuilder Anthropomorphic Phantoms
Kenneth A. Van Riper White Rock Science
James Roberts & Josephine Clorley
Radiation Protection Service
Velindre Cancer Centre, Cardiff
““CMPWGCMPWG--II II ””Computational Medical Physics Working Group Workshop II Computational Medical Physics Working Group Workshop II
Sep 30 Sep 30 –– Oct 3, 2007Oct 3, 2007University of Florida (UF) Hilton Hotel and Conference CenterUniversity of Florida (UF) Hilton Hotel and Conference Center
Gainesville, Florida USAGainesville, Florida USA
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BodyBuilder Program• Generates MIRD geometry in MCNP
format• Any age: newborn to adult
– Interpolation between MIRD models– 0, 1, 5, 10, 15, 21 years
• User choice of Organs to include• Options
– Single Left + Right Cell or Separate L, R Cells– Wall + Contents or Solid (stomach, …)
• New (2004) postures added to models– Legs Up– Sitting
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BodyBuilder Output
• Portions of MCNP input file– Geometry– Materials– Cell Tallies
• User adds source, external geometry• Expanded file with visualization
commands for Moritz or Sabrina– BodyBuilder starts and passes model to
Moritz or Sabrina
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BodyBuilder User Interface
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Some BodyBuilder Models
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Postures
Standing Legs Up Sitting
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The Head
• Components– Cranium & Brain– Face / Jawbone– Spine– Skin– Undifferentiated
tissue• No Salivary Glands
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Salivary Glands
• Added models for – Parotid– Submandibular– Sublingual
• Each 1 (left + right) or 2 (l, r) distinct cells• Started with descriptions from Moore &
Dalley anatomy text– Augmented by CT images, diagrams– Refined during implementation
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Head Surfaces
• Elliptical Cylinders bound components in lower head
• Coordinates– X lateral– Y towards rear– Z vertical
Skin
Spine
Jawbone
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Sublingual Glands
• 2 Y Cylinders tangent at X = 0
• Center Z = top of spine
• Cylinders cut off by– Inner jawbone– Plane 2 cm in (for
adult)
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Submandibular Glands
• Vertical Extent– Centered on
lower edge of jawbone
– Approximately 2 cm thick (adult value)
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Submandibular Glands
• Bounded by– Inner jawbone– Ellip. Cyl. w/ radii
= inner jaw – 2 cm– Y = -2 cm– Y = -5.5 cm– X = ±1.8 cm
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Submandibular without X Plane
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Inner Parotid Glands
• Partoid: Inner & Outer parts (same cell)
• Inner boundaries– Jawbone cylinders– Jawbone rear (Y = 0)– Y = 1.5 cm– Bottom = Jawbone
bottom– Height 4 cm (adult)
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Outer Parotid Glands
• Bounded by– Outer jawbone– Inner skin– X Elliptical cylinder
• rZ = 2.3 cm• rY = 2 cm• Zcenter = Jaw bottom
+ 2 cm• Ycenter = Jaw rear
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Gland Volumes
• Volumes calculated with Moritz• Adult dimensions adjusted to = ICRP 89• 0, 1, 5, 10, & 15 year old
– (BodyBuilder interpolates between ages)– Dimensions X Rcurrent/Radult
• R = Inner jawbone rx
– Volumes calculated each age & adjusted to match ICRP 89
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Summary
• Salivary glands modeled in BodyBuilder– Parotid– Submandibular– Sublingual
• Volumes match ICRP 89• Standard in BodyBuilder
from version 1.31• Ready for …
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The Users
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