hdr brachytherapy nicolas g. zouain, md department of radiation oncology roger maris cancer center
TRANSCRIPT
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HDR BrachytherapyHDR Brachytherapy
Nicolas G. Zouain, MD
Department of Radiation Oncology
Roger Maris Cancer Center
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History19051905
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History
1920’s1920’s
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Dose Rate
Low dose rate (LDR)0.4 to 2 Gy/hr
Medium dose rate (MDR)2 to 12 Gy/hr
High dose rate (HDR)> 12 Gy/hr but usually in the region of 150 Gy/hr ~ 2.5 Gy/min
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Why Brachytherapy
Delivering the high dose of radiation to the tumor
Sparing of the surrounding normal tissues
Delivered in a short period of timeTumor repopulation
Limited to localized tumors
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High Dose Inside of the Tumor
100%100%
25%25%
150%150%
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HDR Afterloading Machine
Iridium-192Iridium-192
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Prostate HDR Brachytherapy
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Breast HDR Brachytherapy
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Lungs HDR Brachytherapy
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Esophagus HDR Brachytherapy
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Cervix HDR Brachytherapy
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Uterus HDR Brachytherapy
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H&N HDR Brachytherapy
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H&N HDR Brachytherapy
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Rectal Brachytherapy
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Rectal Brachytherapy
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Rectal Brachytherapy
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Templates
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Trans Rectal Ultrasound
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Ultrasound Stepper
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Ultrasound Stepper Stabilizer
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TRUS Guided Needles Insertion
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MammoSite
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MammoSite
Lumpectomy Cavity is Created
Troacar Used to CreatePathway to Cavity
Un-inflated MammoSite is Advanced into the CavityThrough the Troacar Path
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MammoSite
MammoSite is Inflated toPosition the Tissue to
Receive Radiation Therapy
Design allows the 192IrSource to be Centrally Positioned within the
Applicator
The 192Ir Source is Delivered Into the MammoSite and
Radiation Therapy is Delivered Per the
Treatment Plan
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MammoSite