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Clinical Aspects of Medical Radia2on Physics Rebecca Guidry, M.S., DABR Clinical Medical Physicist Mary Bird Perkins Cancer Center

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Page 1: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Clinical  Aspects  of  Medical  Radia2on  Physics  

Rebecca  Guidry,  M.S.,  DABR  Clinical  Medical  Physicist  

Mary  Bird  Perkins  Cancer  Center  

Page 2: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

What  is  Medical  Physics?  

•  A  medical  physicist  is  a  professional  who  specializes  in  the  applica2on  of  the  concepts  and  methods  of  physics  to  the  diagnosis  and  treatment  of  human  disease.  

•  Therapeu2c  Physics  •  Diagnos2c  Physics  •  Nuclear  Physics  •  Medical  Health  Physics      

Page 3: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Therapeu2c  Radiological  Physics  

•  The  therapeu2c  applica2ons  of  x-­‐ray,  gamma  ray,  neutron,  electron,  and  charged  par2cle  beams,  and  radia2on  from  sealed  radionuclide  sources.  

•  The  equipment  associated  with  their  produc2on,  use,  measurement  and  evalua2on.    The  quality  of  images  resul2ng  from  their  produc2on  and  use.  

•  Medical  Health  Physics  

Page 4: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Cell  Killing  By  Ionizing  Radia2on  

Page 5: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Diagnos2c  Radiological  Physics  

•  The  diagnos2c  applica2ons  of  x-­‐rays,  gamma  rays  from  sealed  sources,  ultrasonic  radia2on,  and  radio  frequency  radia2on  and  magne2c  fields.  

•  The  equipment  associa2on  with  their  produc2on,  use,  measurement  and  evalua2on.  

•  The  quality  of  images  resul2ng  from  their  produc2on  and  use.  

•  Medical  Health  Physics  

Page 6: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Discovery  of  X-­‐rays  •  On  8  Nov  1895,  Wilhelm  Conrad  Röntgen  (accidentally)  discovered  an  

image  cast  from  his  cathode  ray  generator.  

Page 7: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Diagnos2cs  

•  X-­‐ray  Machines  •  Fluoroscopy  •  Computerized  Tomography-­‐CT  Scanner  •  Magne2c  Resonance  Imager-­‐  MRI  •  MR  Spectroscopy  •  Positron  Emission-­‐PET  Scanner  •  CT-­‐PET  Scanner  

Page 8: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983
Page 9: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Medical  Nuclear  Physics  

•  The  therapeu2c  and  diagnos2c  applica2ons  of  radionuclides  in  unsealed  sources  

•  The  equipment  associa2on  with  their  produc2on,  use,  measurement,  and  evalua2on.  

•  The  quality  of  images  resul2ng  from  their  produc2on  and  use.  

•  Medical  Health  Physics  

Page 10: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Nuclear  Medicine  

•  Radioac2ve  Materials  injected  or  ingested  •  Radioac2vity  yields  images  of  func2on  

•  Fused  MRI/NMI  

Page 11: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Gamma  Camera  Scan  

Page 12: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Medical  Health  Physics  

•  The  safe  use  of  x-­‐ray,  gamma  ray,  neutron,  electron  and  other  charged  par2cle  beams  or  radionuclides  in  medicine  (for  diagnos2c  or  therapeu2c  purposes).  

•  The  instrumenta2on  required  to  perform  appropriate  radia2on  surveys.  

•  Radia2on  Safety  Officer  

Page 13: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Emergency  Management  of  Radia2on  Casual2es  

Page 14: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Radia2on  Exposure/Contamina2on  

•  Accidents  •  Nuclear  reactor  •  Industrial  irradiator  •  Lost/stolen  sources  •  Transporta2on  •  Medical  radia2on  •  Terrorist  Event  

Page 15: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Radia2on  Doses  and  Dose  Limits  

•  Flights—LA  to  London      5  mrem  •  Annual  Public  dose  limit                100  mrem  •  Natural  Background  annual                300  mrem    •  Heart  Catheriza2on,  Barium  enema,  Chest  X-­‐ray,  fetal  dose  limit,  radia2on  worker  limit…  

•  Governs  worker  safety,  pa2ent  safety,  staff  safety,  general  public  safety  

Page 16: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Primary  Discipline  

76%

15%

3% 4% 1%1%

Radiation Therapy

Imaging Physics

Nuclear Medicine

Health Physics

Engineering

Administration

Page 17: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Primary  Responsibility  

78%

8%

5%3% 4% 2%

Clinical

Academic

Research

Administrative

Regulatory

ProductDevelopment

Page 18: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Clinical  Responsibili2es  

•  Daily  clinical  support  •  Equipment  acquisi2ons  •  Site  planning  •  Quality  assurance-­‐d-­‐w-­‐m-­‐a  •  Dose  calcula2ons  •  Liaison  between  other  medical  professionals,  manufacturers,  regulatory  agencies  

•  Development,  inves2gate,  scien2fic  research  

Page 19: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Professional  Training  

•  MS  or  PhD  in  Medical  Physics  •  MS  or  PhD  in  physics  or  related  discipline  with  post-­‐graduate  academic  training  in  medical  physics  

CLINICAL  TRAINING  •  Residency  in  clinical  medical  physics-­‐CAMPEP  BOARD  ELIGIBILITY  2014  •  Must  have  CAMPEP  approved  residency    

Page 20: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

LSU  Medical  Physics  Program  

•  Phys.lsu.edu  – Medical  Physics  &  Health  Physics  Program  – Graduate  Program  – CAMPEP  Accredited  – Curriculum-­‐Health  Physics  or  Medical  Physics  

•  Marybird.org-­‐  Medical  Physics  Program  – Graduate  Training  Program  – Residency  Training  Program  

Page 21: Clinical’Aspects’of’Medical’ Radiaon’Physics’ · Clinical’Aspects’of’Medical’ Radiaon’Physics ... Nuclear’Medicine ... 1969 1971 1973 1975 1977 1979 1981 1983

Total AAPM Membership

0

1000

2000

3000

4000

5000

6000

1969

1971

1973

1975

1977

1979

1981

1983

1985

1987

1989

1991

1993

1995

1997

1999

2001

2003

Year

Num

ber o

f Mem

bers

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