HM2 Radiology

What vertical angulation setting should you use when exposing a maxillary anterior occlusal radiograph? 1. +50 degrees 2. +55 degrees 3. +60 degrees 4. +65 degrees

+65 degrees For maxillary anterior occlusal radiographs, set the vertical angulation of the tube head at +65°. Center the tube head cylinder on the bridge of the patient's nose.

When exposing a maxillary posterior occlusal radiograph, you should use what vertical angulation setting? 1. +75 degrees 2. +70 degrees 3. +65 degrees 4. +60 degrees

+75 For maxillary posterior occlusal radiographs, set the vertical angulation of the tube head at +75°. Center the tube head at the top of the patient's nose.

When exposing a mandibular anterior occlusal radiograph, what vertical angulation should you use? 1. -10 degrees 2. 5 degrees 3. 0 degrees 4. +5 degrees

-10 For mandibular anterior occlusal radiographs, set the vertical angulation of the tube head at - 10°. Center the tube head cylinder on the tip of the patient's chin.

You should wait what number of seconds between films before inserting another film into the automatic processor? 1. 10 2. 12 3. 15 4. 30

15

A patient presenting with chronic cervical spine pain should be ordered what type of radiograph? 1. KUB 2. AP Cervical Spine 3. Pelvic 4. Chest PA

2. AP Cervical Spine

Which of the following structures will be seen in the AP projection of the cervical spine? 1. C1-T3 2. C2-T4 3. C3-T1 4. C4-T2

3. C3-T1

For mandibular anterior occlusal radiographs, position the patient so the ala-tragus line is at a ?

45% angle

When checking for light leaks in the darkroom, you should leave the penny on the X-Ray film for at least what number of minutes? 1. One 2. Five 3. Three 4. Seven

5 1. Obtain a piece of unexposed X-ray film. 2. Lay the film on the workbench, and place a penny over it for a period of 5 minutes. 3. Process the film. 4. The processed film should show no image. If the outline of the penny can be seen, there is light leakage and the HM should inform the supervisor.

The rule that applies to the principle of radiation safety is?

A good rule is the acronym, ALARA, "As Low As Reasonably Achievable."

The paralleling device consists of which of the following parts? 1. A locator ring 2. An indicator rod 3. A bite-block 4. All of the above

All of the above

Which of the following instruction is most important when ordering radiographs for female patients?

Ask the patient if she is pregnant Before taking radiographs on a female, always ask whether or not she is pregnant or if pregnancy is questionable. If there is belief of a pregnancy, consult a provider.

Which of the following methods is most commonly used to process dental radiographs in the Navy? 1. Laser processing 2. Manual processing 3. Computer processing 4. Automatic processing

Automatic processing is the most commonly used method of processing medical and dental radiographs in the Navy.

Which of the following procedures should be included in the daily maintenance of the X-Ray machine? 1. Dusting 2. Cleaning with a cloth moistened with water 3. Both 1 and 2 4. Cleaning with a cloth moistened with solvent

Cleaning with a cloth moistened with water

How often should the surfaces in the dark room be disinfected?

Daily

Which of the following personnel are authorized to order and diagnostically interpret dental radiographs?

Dental officers

The developer and fixer solutions in the automatic processor should be changed at what minimum frequencies? 1. Daily 2. Weekly 3. Biweekly 4. Every 3 to 4 week

Every 3 to 4 weeks

The processing solutions used in the automatic processor are the same as those used in the manual processing procedure. 1. True 2. False

False

You should attempt to complete all X-Ray repairs yourself. 1. True 2. False

False

The bisecting angle technique is the preferred method and recommended for routine use when taking periapical radiographs. 1. True 2. False

False Use the bisecting-angle technique when paralleling devices are not available; when a patient finds it painful or impossible to close on the bite-block; or when an X-ray is needed when a rubber dam is in place.

At approximately what angle should the ankle be when taking an oblique radiograph? 1. 30 2. 45 3. 60 4. 90

Grasp the lower femur with one hand and the foot with the other. Internally rotate the entire leg and foot together until the 30-degree position is achieved

Of the following personnel who is NOT allowed to order radiographs? 1. IDC 2. HM 3. PA 4. MO

HM Only a Medical Officer, Dental Officer, Nurse Practitioner, Physician Assistant (PA) and Independent Duty Corpsmen (IDC) can order a radiographic examination.

Which of the following is NOT a safety precaution for taking radiographs?

Hold the film packet in the patient's mouth during exposure if necessary • NEVER stand in the path of the central Xray beam during exposure • NEVER hold the X-ray film packet in the patient's mouth during a dental exposure • NEVER hold the tube head or the tube head cylinder of the X-ray machine during exposure • ALWAYS stand behind a lead-lined window during an exposure

Which of the following oragns will not be seen in a KUB radiograph? 1. Kidney 2. Liver 3. Ureters 4. Bladder

Liver

Prolonged exposure to radiation may result in?

Loss of hair redness and inflammation of skin blood count change cell atrophy ulcerations sterility genetic damage cancer leukemia death

Which teeth can be identified radiographically by a large white region caused by the bone of the nasal septum? 1. Mandibular incisors 2. Mandibular cuspids/bicuspids 3. Maxillary incisors 4. Maxillary incisors and bicuspids

Maxillary Incisor Area Radiographs of this area usually show a large white region caused by the bone of the nasal septum.

What landmark is used when exposing the maxillary bicuspid area? 1. Tip of the nose 2. Beside the ala of the nose 3. Below the pupil of the eye 4. Below the out angle of the eye and below the zygomatic bone

Maxillary bicuspid area: Landmark 3, below the pupil of the eye.

The cleaning of the roller transports and the solutions in the automatic processor are accomplished at what minimum intervals? 1. Twice a day 2. Daily 3. Weekly 4. Monthly

Monthly

All of the following are indications for a PA of the chest, EXCEPT? 1. Pain with respiration 2. Chronic cough 3. Asbestos 4. Rash and streaking

Rash and streaking

What should be shielded when you are taking an X-ray? 1. Hypothalamus 2. Heart 3. Reproductive organs 4. Scrotum

Reproductive organs

What X-Ray machine settings should you use when exposing a maxillary occlusal radiograph on an adult? 1. 10 mA, 87kVp, and 60 impulses 2. 12 mA, 90kVp, and 60 impulses 3. 10 mA, 90kVp, and 60 impulses 4. 12 mA, 87kVp, and 40 impulses

Set the X-ray machine at 10 mA, 90 kVp, and 60 impulses (1 second).

Which of the following is NOT a characteristic property of X-Rays?

Some of the characteristics and properties of Xrays are: • They travel in straight lines at the speed of light • They affect photographic film by producing a hidden image made visible by processing • They cause certain substances to fluoresce (glow) • They cause irritation of living cells. In large amounts can cause necrosis (death) of the cells, a fact that necessitates caution in using X-rays

The time setting on the X-Ray machine is measured by using which of the following methods?

The MAS (milliampere per second) controls the exposure time to the patient14

The film badge should be placed behind the lead-lined barrier at least what number of feet from the tube head?

The badges are placed in the X-ray room behind the technician's protective lead-lined barrier or at least 6 feet from the tube head and never in the direct line of radiation during exposure.

Which scientist first discovered X-Rays?

The rays were discovered in 1895 by a scientist, Wilhelm Conrad Roentgen.

What is the name of the tube that was discovered in 1895?

The rays were discovered in 1895 by a scientist, Wilhelm Conrad Roentgen. While experimenting with a device called a Crooke's tube, which generated cathode rays.

A safe light is the only safe source of illumination used in the darkroom when processing radiographs. 1. True 2. False

True

When mounting radiographs, the raised dimple should be facing you. 1. True 2. False

True

When taking radiographs, always drape the patient with a lead apron. 1. True 2. False

True

The position of the patient's mid-sagittal plane must be perpendicular to the floor when exposing a periapical radiograph using the bisecting-angle technique. 1. True 2. False

True Remember that the patient's midsagittal plane must be perpendicular to the floor.

The occlusal film packet contains two X-Ray films. 1. True 2. False

Unlike the periapical and bitewing packets, the occlusal packet contains two X-ray films. This allows different developing times to be used for these films.

When taking radiographs, which of the following factors should you consider before using the bisecting-angle technique? 1. There are no paralleling devices available 2. The patient cannot close mouth on bite-block 3. The patient has a rubber dam in place 4. All of the above

Use the bisecting-angle technique when paralleling devices are not available; when a patient finds it painful or impossible to close on the bite-block; or when an X-ray is needed when a rubber dam is in place.