Mock Exam questions with answers 100% verified

If a linear accelerator is properly calibrated, the field size indicated at the control console will correspond to the size of the field at the: - correct answers Mechanical Isocenter A patient is treated with parallel-opposed mantle and paraortic fields of lengths 30 cm and 15 cm respectively. Calculate the gap required on the surace for the beams to intersect at the midline depth of 10 cm, SSD 100 - correct answers 2.25 cm (30/2 X 100/10)+(15/2 X 100/10) While treating a patient on a linear accelerator. an equipment malfunction causes the main circuit breaker to be tripped. The therapist should do all fo the following EXCEPT: A: immediately remove the patient from the treatment room B: Record treatment dosage recieved on the mechanical counter C: Resent circuit breaker and continue treating D. Calculate required remaining doseage - correct answers immediately remove the patient from the treatment room While the frequency of acquiring digital or hard copy portal images varies, they should all be aquired - correct answers prior to or on the first day of treatment The approximate 5 year survival rate for stage II (T4 N0 M0) colorectal cancer is - correct answers 60-85% The TD 5/5 for the rectum is - correct answers 6000 cGy Gadolinium is a common contrast agent utilized for which diagnostic study? - correct answers 6000 cGy Which of the following is not an item checked during daily warm-up of the linear accelerator? - correct answers MRI If a patient has been prescribed 120 cGy/fraction b.i.d. to a total dose of 6000 cGy. How many fractions remain after delivering 1800 cGy? - correct answers 35 Wedge angle refers to: - correct answers angle through which an isodose curve is tilted at the central axis at a specific depth The normal prostate is located: anterior to rectum inferior to bladder posterior to the symmphysis - correct answers all The greatest occurrence of salivary neoplasms are found in the - correct answers parotid gland As identified in the treatment plan, which volume is the largest? - correct answers Irradiated Volume IF a patient begins to cough vigorously during treatment delivery, the RT should - correct answers stop the treatment and check on the patient and portal alignment Radiographyically, which primary lesion can be described as having a sunburst appearance? - correct answers Osteosarcoma The most frequent site of a soft tissue sarcoma metastases is - correct answers lung Which of the following is not a pathogen? A: viruses B: protozoans C: fungi D: fomites - correct answers D The Philadelphia chromosome is associated with which leukemia? - correct answers CML The intersection point of the axis of rotation of the collimator and the axis of rotation of the gantry defines what? - correct answers Mechanical isocenter The first sign of the acute radiation syndrome following a large exposure of radiation is usually - correct answers Nausea This is a common oncologic emergency associated with cancer. Presenting symptoms include fatigue, lethargy, weakness, nausea, dehydration, and decreased mental fuction - correct answers Hypercalcemia The majority of larynx tumors arise on this area - correct answers glottis Acute radiation effects include all of the following EXCEPT: A: diarrhea B: erythema C: epilation D: radiation pneumonitis - correct answers D Which is the main advantage of used a split beam technique? (1/2 beam blocking) - correct answers preventing beam divergence Which of the following would serve as the best method for protection from a high-energy gamma source - correct answers increasing distance from source A radiotherapy patient has right to confidentiality of all info regarding their care right to refuse treatment - correct answers both An ataxic patient is said to be - correct answers lacking coordination The doctrine that holds an employer liable for negligent acts of employees is described as - correct answers doctrine of respondeat superior Inferiority, the spinal cord terminates at which level - correct answers L2 Dose rate increases - correct answers with increased field size The practical range (max dose) for 6 MeV electrons is - correct answers 3cm The use of a finger or ring badge monitoring is a particular importance to those persons involved with the - correct answers handling of radionuclitides The radiation safety officer must be notified if a personnel monitoring device is - correct answers lost damaged left in vault during treatment Characteristic radiation occurs when - correct answers Which of the following describes infection transmitted via droplet nuclei, dust particles, or skin squames - correct answers airborne transmission the acceptable limit for linear accelerator jaw symmetry is - correct answers 2 mm The most common pathologic subtype for melanoma of the skin is - correct answers superficial spreading The TD 5/5 for the whole kidney is - correct answers cGy Variation of output of a linear accelerator by more than 3% from the baseline usually - correct answers requires notification of the physics staff Hyperfractionated (bid) radiotherapy is becoming standard in the management of certain cancer patients. The minimum interval between dose factions should be - correct answers 6 hrs 300 rem is equivalent to ____ sv - correct answers 3 sv dose equivalent is measued in - correct answers rem or sievert what 3 drugs may improve the appetite and food intake for a cancer patient - correct answers prednisone dexamethasone megestrol Epidemiology may be defined as - correct answers study of the distribution of disease The primary lymphatic drainage of the oropharynx is to the - correct answers jugulodigastic nodes Orthovoltage x-ray units usually operate in the range of - correct answers 150 to 500 kVp If an informed consent is not obtained prior to radiation delivery, which tort is most applicable - correct answers battery the most common malignancy in children is - correct answers leukemia ascites is a common symptom related to which of the following cancers - correct answers ovarian cancer if a 30 degree wedge is inadvertently omitted from the treatment, the central axis dose is - correct answers increased The normal pulse rate in an adult is - correct answers 60 to 90 bpm Radiation induced oral cavity mucositis can be managed with the help of - correct answers saltwater rinses bicarbonate rinses The most frequent site of breast cancer mets is - correct answers bone the mass of the nucleus if comprised of - correct answers protons and neutrons According to the NCRP regulations, the annual dose equivalent limit for non-stocastic effects to the lens of the eye for an occupational worker is - correct answers 150 mSv 15 rem Which of the following is not permitted as a method of observation during an external beam radiation therapy? TV monitoring of patient mirror monitoring direct in room monitoring intercom monitoring - correct answers direct in room monitoring of the patinet Lateral and sagittal lasers should intersect at a point and correspond to the : rotational axis of the unit SAD of the machine isocenter of the unit - correct answers all A light to radiation beam coincidence test is used to determine if the light and radiation fields are proportional on the central axis congruent - correct answers all A treatment in which the SAD remains constant at all times is refered to as a - correct answers isocentric technique If an access door is accidentally opened with the machine in the "on" position, which of the following shall occur - correct answers irradiation will be terminated Which of the following devices is most often employed to measure the radiation levels in the room of a brachytherapy patient - correct answers cutie pie During treatment simulation for the urinary bladder, visualization is improved by the introduction of a _____ into the urinary bladder - correct answers iodine contrast agent Order the following in the correct sequence to describe the passage of urine through the urinary tract 1. collec