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Dosimetry > Prostate Implants > Flashcards

Prostate Implants Flashcards

1
Q

stage for prost implants?

A

early stage

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2
Q

temp implant needs long/short t1/2?

A

long t1/2

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3
Q

perm implant needs long/short t1/2?

A

short t1/2 (tx more aggressive)

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4
Q

perm prost implant pt positioning/? anesthetic

A

spinal anesthetic, dorsal lithotomy position

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5
Q

perm prost implant isotopes

A

I-125 or Pd-103

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6
Q

perm prost implant interseed & needle spacing

A

1 cm

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7
Q

perm prost seed concerns

A
  • hot/cold spots

- anisotropy

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8
Q

perm prost seed needle size

A

18 gauge

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9
Q

perm prost seed does not exceed ? rem over life of implant or ? mrem/hr

A

0.5 rem over life of implant; 5 mrem/hr

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10
Q

perm prost seed pt contact with others

A

does not have prolonged contact with preg women or children for 2 months

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11
Q

perm prost seed pt sex precaution

A
  • no sexual activity for 2 weeks

- use protection after few weeks

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12
Q

perm prost seed implant survey meter used

A

GM tube or scintillation counter

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13
Q

temp prost isotope used

A

Ir-192

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14
Q

temp prost implant done at time of?

A

laparotomy & pelvic node sampling

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15
Q

temp prost implant # needles used

A

10-15 needles

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16
Q

temp prost implant dose ? Gy ? fx plus ?

A
  • 10-25 Gy
  • 3-4 fx
  • plus 45 Gy XRT
17
Q

temp prost implant procedure

A
  • bladder hypaque &

- dummy seeds to take film of location

18
Q

I-125 dose ? Gy @ ? cGy/hr

A

-145 Gy @ 5-10 cGy/hr

19
Q

Pd-103 dose ? Gy @ ? cGy/hr

A

120 Gy @ 20-30 cGy/hr

20
Q

prost implant TNM stage

A

T1-2a

21
Q

prost implant Gleason score

A

Gleason <10

22
Q

temp implant needs ? dose rate

A

sufficient dose rate

23
Q

temp implant how long

A

3-4 days

24
Q

perm implant needs isotope that emits photons of low/high E?

A

emits photons of low E

25
Q

perm implant prescribed dose is delivered through ? decay of source

A

complete

26
Q

perm prost seed needle length

A

21 cm long

Dosimetry (53 decks)

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