Tentamen (uitwerkingen)

MDCB: Mock Exam 2 Questions with 100% Verified Correct Answers

0 keer verkocht

Vak
MDCB

Instelling
MDCB

MDCB: Mock Exam 2 Questions with 100% Verified Correct Answers A patient receiving treatment to the head and neck region has experienced a skin reaction and mucositis at a total dose much lower than anticipated. The radiation oncologist requests an evaluation of the treatment. Which of the followi...

[Meer zien]

Voorbeeld 3 van de 16 pagina's

Bekijk voorbeeld

Geupload op 8 september 2024
Aantal pagina's 16
Geschreven in 2024/2025
Type Tentamen (uitwerkingen)
Bevat Vragen en antwoorden

a patient receiving treatment to the head and neck

Instelling MDCB
Vak MDCB

Volgen

Winfred Lid sinds 2 jaar 594 documenten verkocht

$10.49

In winkelwagen

Opslaan

100% tevredenheidsgarantie
Direct beschikbaar na je betaling
Lees online óf als PDF
Geen vaste maandelijkse kosten

MDCB Exam Questions with 100% Verified
Correct Answers
Which one of the following dose volume histogram (DVH) results for a pancreatic treatment plan of
conventional fractionation meets QUANTEC recommended dose tolerances?

A. 75% of the left kidney will receive 30 Gy.

B. 50% of the right kidney will receive 40 Gy.

C. 50% of the liver will receive 42 Gy.

D. 25% of the stomach will receive 45 Gy. - Correct Answer D. 25% of the stomach will receive 45 Gy.

An algorithm often used for electron beam dose calculations is:

A. scatter-air ratio (SAR) summations.

B. Batho & Young corrections.

C. Clarkson calculations.

D. pencil beams. - Correct Answer D. pencil beams.

Any error in the placement of adjacent fields during radiotherapy treatment is most likely to:

A. be equally serious for beams of any penumbra.

B. be more serious with beams of smaller penumbra.

C. have no impact the treatment outcome.

D. be more serious with beams of larger penumbra. - Correct Answer B. be more serious with beams
of smaller penumbra.

A radiation oncology department has a selection of 6, 10, and 18 MV photon beams. For a 7 beam
prostate Intensity Modulated Radiation Therapy (IMRT) plan, it would be appropriate to select a/an:

A. 6 MV photon beam because it would deliver no neutron dose and the lowest doses to the tissue
outside the planning target volume (PTV).

B. 6 MV photon beam because it would deliver some neutron dose, but give the best dose
distribution to the PTV.

C. 10 MV photon beam because it would deliver a lower neutron dose than an 18 MV photon beam
and clinically acceptable doses to the bladder and rectum.

D. 10 MV photon beam because it would deliver no neutron dose and the lowest doses to the tissue
outside the PTV. - Correct Answer A. 6 MV photon beam because it would deliver no neutron dose
and the lowest doses to the tissue outside the planning target volume (PTV).

,What can cause increased skin dose in IMRT for prostate cancer?

A. prone position

B. wedge under knees- a support device

C. use of high energy photons

D. carbon fiber couch - Correct Answer D. carbon fiber couch

Characteristics of multileaf collimators, in current medical LINACs, include which of the following:

A. accommodates all field sizes.

B. "scalloped" isodose curves in the penumbra region.

C. ability to conform to all possible field shapes.

D. inability to verify leaf shapes. - Correct Answer B. "scalloped" isodose curves in the penumbra
region.

The minimum nominal distance a tissue compensator should be placed from the skin surface without
affecting the skin sparing effect is:

A. 5.0 cm.

B. 10.0 cm.

C. 20.0 cm.

D. 25.0 cm. - Correct Answer C. 20.0 cm.

When treating with electrons typical X-ray contamination dose to a patient ranges from
approximately:

A. 0.1% to 0.4%

B. 0.5% to 5%

C. 6% to 9%

D. 10% to 12% - Correct Answer B. 0.5% to 5%

The most significant factor effecting calculation of dose with tissue inhomogeneity correction is:

(A) energy of the beam

(B) size of inhomogeneity

(C) depth of inhomogeneity - Correct Answer (B) size of inhomogeneity

, The five year cure rate for a prostate cancer tumor treated with primary radiation is:

(A) 5 - 10%

(B) 25 - 30%

(C) 50 - 70%

(D) 75 - 95% - Correct Answer (D) 75 - 95%

A lung tumor is to be treated utilizing a 90 degree arc. For a target volume centered 6.0 cm

below the skin surface, how far below the skin surface should the isocenter be placed?

(A) 2.5 cm

(B) 6.0 cm

(C) 9.0 cm

(D) 12.0 cm - Correct Answer (C) 9.0 cm

Very accurate specification of dose at depth in a wedged field necessitates that the

medical dosimetrist accounts for which of the following factors?

(A) same central axis percent depth dose that occurs in a wedged field

(B) wedge transmission factor is measured in air or in tissue

(C) no variations of the wedge transmission factor with field size

(D) reduction in collimator scatter that is reaching the patient - Correct Answer (B) wedge
transmission factor is measured in air or in tissue

The five year cure rate for a bladder cancer tumor treated with primary radiation is:

(A) 0 - 5%

(B) 5 - 10%

(C) 25 - 30%

(D) 50 - 70% - Correct Answer (C) 25 - 30%

The five-year survival rate for a esophageal cancer tumor treated with primary radiation is:

(A) 0 - 5%

(B) 5 - 10%

(C) 25 - 30%

Dit zijn jouw voordelen als je samenvattingen koopt bij Stuvia:

Bewezen kwaliteit door reviews

Studenten hebben al meer dan 850.000 samenvattingen beoordeeld. Zo weet jij zeker dat je de beste keuze maakt!

In een paar klikken geregeld

Geen gedoe — betaal gewoon eenmalig met iDeal, Bancontact of creditcard en je bent klaar. Geen abonnement nodig.

Focus op de essentie

Studenten maken samenvattingen voor studenten. Dat betekent: actuele inhoud waar jij écht wat aan hebt. Geen overbodige details!

Veelgestelde vragen

Wat krijg ik als ik dit document koop?

Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.

Tevredenheidsgarantie: hoe werkt dat?

Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.