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Boards Review > W/L Ch 15 Special Procedures Quiz > Flashcards

W/L Ch 15 Special Procedures Quiz Flashcards

1
Q 
Which of the following organs that can be affected by motion?
I.   Lung
II.  Liver
III. Pancreas
a.	I and II
b.	II and III
c.	I and III
d.	I, II, and III
A

d. I, II, and III

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2
Q

Which of the following is a goal of radiation oncology?

a. Reduce side effects
b. Deliver accurate and precise treatments
c. Increase toxic effects
d. All of the above

A

a. Reduce side effects

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3
Q

Besides the patient and reference frame being registered, the stereotactic treatment must also ___________________.

a. control motion
b. conform to the fiducial
c. increase target volume
d. reduce treatment time

A

a. control motion

Stereotactic treatments can use large fraction size, so motion must be controlled to avoid more dose to normal tissue.

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4
Q

Heavy charged particles like protons have a(n) __________ fall-off in tissue that is desirable.

a. continuous
b. sharp
c. shortened
d. absent

A

b. sharp

An advantage of proton treatment is the Bragg Peak and the sharp fall-off.

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5
Q

Respiratory motion can be managed by which of the following?
I. Rapid CT scanning
II. 4DCT
III. Two–breath-hold CT

a. I and II
b. II and III
c. I and III
d. I, II, and III

A

b. II and III

Three different computed tomography (CT) approaches are slow CT scanning, two–breath-hold CT, and 4DCT.

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6
Q

Devices that are on the linear accelerator for imaging include all except which of the following?

a. OBI
b. EPID
c. CT-on-rails
d. Cone beam CT (CBCT)

A

c. CT-on-rails

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7
Q

Cone beam CT, TomoTherapy, and CT-on rails correct for _________ motion.

a. interfraction
b. intrafraction

A

a. interfraction

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8
Q

Cranial stereotactic treatments began with which of the following?

a. Cyber knife
b. Proton accelerator
c. Gamma knife
d. SBRT

A

c. Gamma knife

The first gamma knife treatment occurred in 1951.

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9
Q

Stereotactic treatments have been improved on linear accelerators because of which of the following advances?

a. High-quality in-room imaging
b. Tighter mechanical specifications
c. Small field treatments
d. Only a and b

A

d. Only a and b

Imaging and mechanical advances have improved stereotactic treatments but the fields remain small and precise.

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10
Q

Radiation therapists and radiation oncologists prefer the kV images because the _______________________.

a. contrast is better
b. metal artifacts are reduced
c. timing is more efficient
d. resolution is not an issue

A

a. contrast is better

The kV images provide better soft tissue contrast than MV images.

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11
Q

TomoTherapy differs from some other volumetric imaging techniques because it __________________________.

a. is both a CT and a linear accelerator
b. uses kV and MV imaging
c. delivers customized fields
d. uses the same source for imaging and treating

A

d. uses the same source for imaging and treating

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12
Q

Which of the following is the motion management method that defines an internal target volume?

a. OBI
b. compression
c. conservative
d. MIP

A

c. conservative

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13
Q

The cyber knife can treat anywhere in the body because it uses a(n) ___________ technique.

a. nonisocentric
b. repetitive
c. real-time
d. isocentric

A

a. nonisocentric

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14
Q

Electronic portal imaging devices (EPID) can ___________________.
I. use MV and kV
II. take orthogonal images
III. send images to multiple locations

a. I and II
b. II and III
c. I and III
d. I, II, and III

A

b. II and III

EPID uses only MV to create beam’s-eye view images.

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15
Q

For the ultrasound unit to know where it is in reference to the linear accelerator, it must be ________________ with the treatment delivery unit.

a. localized
b. attenuated
c. B-moded
d. registered

A

d. registered

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16
Q

Forced shallow breathing technique is used to control which of the following?

a. Compression
b. Imaging
c. Motion
d. Interfraction dose

A

c. Motion

17
Q

Protons are ________________.

a. highly imaged
b. heavy charged particles
c. extended range
d. electrons

A

b. heavy charged particles

18
Q

A single fraction of radiation to a brain metastasis would be what kind of stereotactic treatment?

a. Stereotactic radiation therapy (SRT)
b. Stereotactic body radiation therapy (SBRT)
c. Stereotactic radiosurgery (SRS)

A

c. Stereotactic radiosurgery (SRS)

19
Q

A four-dimensional CT scan uses a(n)__________________.

a. oversampled spiral CT scan
b. pitch of 1.5
c. scanner rotation of 0.5 second
d. auditory respiratory signal

A

a. oversampled spiral CT scan

4DCT uses an oversampled spiral CT, a pitch of 0.5, a scanner rotation of 1.5, and an external respiratory signal.

20
Q

Turning the radiation on and off when the target is within the treatment volume represents which of the following?

a. A fiducial system
b. Gated treatments
c. A 4DCT data set
d. Forced shallow breathing

A

b. Gated treatments

21
Q

Which of the following is the only approach to managing motion that allows for real-time feedback?

a. 4DCT
b. Gated treatment
c. RPM system
d. Electromagnetic transponder

A

d. Electromagnetic transponder

Electromagnetic transponder provides real-time feedback; the target isocenter can be monitored up to 10 times per second.

22
Q

Cone beam CT _______________________.

a. uses a fan beam
b. has a 3D extended digital array
c. has an area detector with 2D extended digital array
d. has multiple rotational speeds

A

c. has an area detector with 2D extended digital array

23
Q

Which of the following is a process that aligns multiple data sets into a single coordinate system so that the spatial locations of corresponding points coincide?

a. Registration
b. Recombination
c. IGRT
d. MIP

A

a. Registration

24
Q

Image-guided radiation therapy is useful because it can ____________________.
I. result in a more focused treatment
II. account for interfraction and intrafraction motion
III. compare in-room image set with treatment planning image set

a. I and II
b. II and III
c. I and III
d. I, II, and III

A

d. I, II, and III

25
Q

The typical width of the spread-out proton Bragg’s peak (SOBP) is _____________.

a. 2 to 16 mm
b. 2 to 16 cm
c. 1 to 25 mm
d. 1 to 25 cm

A

b. 2 to 16 cm

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