Lab Film Critiques Flashcards
T or F: LPO ribs may be done prone and or upright if needed depending on the patients condition .
true
Is the following True or False about LPO rib x-rays:
CR PERPENDICULAR TO IR, CENTERED MIDWAY BETWEEN LATERAL RIB MARGIN AND SPINE, CENTERED AT THE LEVEL OF JUGULAR NOTCH.
false
When x-raying Left (LPO) ribs- please choose the best marker and placement from the choices below.
left marker , left upper outer corner
On an LPO radiograph will the sternum be superimposing the heart shadow?
yes
For the following position, state whether the patient is rotated toward or away from the affected side to demonstrate the axillary ribs in the oblique position.
AP (posterior oblique)
toward the affected side
For the following position, state whether the patient is rotated toward or away from the affected side to demonstrate the axillary ribs in the oblique position.
PA (anterior oblique)
away from the affected side
What degree of patient rotation is used for AP oblique rib images?
45 degrees
What patient respiration and body position is used when imaging the ribs above the diaphragm for a normal ambulatory patient?
inspiration, erect
What patient respiration and body position is used when imaging the ribs below the diaphragm?
expiration, recumbent
True or false
On an above-diaphragm posterior oblique rib image with accurate positioning, the (A) 7TH AXILLARY RIB or STERNUM is centered within the collimated field. This is accomplished by centering a (B) PERPENDICULAR central ray halfway between the midsaggital plane and (C) AFFECTED LATERAL RIB MARGIN, at a level halfway between the (D) JUGULAR NOTCH and the (E) XIPHOID TIP.
true
if you were to use a CR cassette what size would you choose for an AP C-Spine .
10X12
What is the preferred SID used for an AP C-spine ?
40 in SID
True or False :
A patient may have an AP C-spine radiograph taken
Upright
Decub
Supine
Sitting
Standing
true
What CR angle is used for an AP C-Spine ?
15-20 degrees cephalic
Does the SID change when the patient position changes from upright to supine for an AP C-spine ?
no
Can the CR angle change when the patient position changes from upright to supine for spines?
It may change depending on the lordotic curve change due to gravity on the neck
If spinous processes are not equidistant to the pedicles what positioning error has occurred?
rotation
The names of the cervical vertebral curvatures are: LORDOTIC, PRIMARY COMPENSATORY CURVE, CONCAVE
true
What positioning error occurs if the CR is not angled enough?
entire joint spaces are closed
If not all vertebrae are visualized on an c-spine AP axial, what other projection must be performed to complete the AP projection?
open mouth / odontoid
How many cervical vertebrae are visualized on an AP axial projection?
5
Is this statement true or false:
5 body positions for an oblique L-spine projection can be performed : SUPINE, PRONE, SEMIERECT, ERECT, SITTING
true
Please choose the correct answer :
An average kVp range for a medium sized patient receiving an AP L-spine would be from _____kVp to _____kVp. (high kVp low mas technique)
85 to 90
Where should your marker placed?
Lateral margin of the collimated field
Should your marker be within any pertinent anatomy ?
no
if you are seeing this on a radiograph what position is your patient in?
FLATTENED ILLIAC WING IS ON THE RIGHT SIDE OF THE BODY. FORESHORTENED iLLIAC WING ON THE LEFT
RPO
Should the spinal column in be the midline of the collimation field and display screen for any and all L-spine radiographs no matter what position?
yes
How much (how many degrees) will the patient’s torso rotated for an AP oblique lumbar image?
45
How much rotation is required to better visualize the upper lumbar region?
50
Is this answer to the question posed true or false?
Why is there a degree difference for upper lumbar than for lower lumbar oblique views ?
Answer: UPPER LUMBAR VERTEBRAE MORE RESEMBLE THE THORACIC VERTEBRAE AND ZYGAPOPHYSEAL JOINTS LIKE AT MORE OF A STEEPER ANGLE
true
Is the patient’s naval a reliable landmark when locating the mid lumbar vertebral column?
no
What body plane is used to determine patient obliquity for an AP oblique lumbar image?
MIDSAGGITAL PLANE (MSP) or MIDCORONAL PLANE
what anatomic structure correlates to the ear of the Scottie dog?
superior articular process
what anatomic structure correlates to the nose of Scottie dog?
transverse process
what anatomic structure correlates to the body of the Scottie dog?
body of vertebrae
what anatomic structure correlates to the eye of the Scottie dog?
pedicle
what anatomic structure correlates to the front leg of the Scottie dog?
inferior articular process
On an AP oblique lumbar image with proper imaging, the (A) __________________ is centered within the collimated field. This is accomplished by centering the CR 2 inches (B) _______ to the elevated (C) _____ at a level 1 ½ inches superior to the (D) _________.
A. third lumbar vertebrae
B. medial
C. ASIS
D. iliac crest
Is this statement True or False:
When taking an AP or PA(rarely done) radiograph of a sacrum you may do this prone , supine, decubitus or standing
true
From the choices below….
What would be the best Digital Technique used for an average adult when radiographing an AP sacrum :
(remember radiation protection)
90@8
Is this statement underlined true or false regarding the Sacrum?
(the specific central ray location (include any angles) and landmarks used to position the CR):
15* CEPHALIC ANGLE TO ENTER 2” SUPERIOR TO SYMPHYSIS PUBIS AT MSP
true
Is gonadal shielding used on all patient AP sacral images?
no
For an AP sacrum on a female patient should you shield the gonads?
no
For an AP sacrum on a male patient should you shield the gonads ?
yes
How can you ensure that patient rotation is not present before taking the x-ray? MAKE SURE
- ASIS ARE EQUIDISTANT FROM TABLE TOP
- THE PATIENT IS BENDING THE KNEES
- YOU ARE LOOKING AT THE PATIENT
- YOU ARE KEEPING THE SHOULDERS FLAT AND HEAD STRAIGHT
1
Do you need to instruct your patient to empty their bladder and colon before an AP sacral image is taken?
Yes or No
yes
Is this statement true or false regarding Sacral imaging ?
A FULL BLADDER OR FECAL MATERIAL CAN OBSCURE ADEQUATE VISUAL OF ANATOMY. AIR IN COLON, HOWEVER, CAN MAKE VISUALIZATION OF SACRUM EASIER.
true
To radiograph a PA Caldwell skull (using DR), what technique should be used for a medium sized adult?
(hint: high kVp low mAs technique chart provided to you……..)
85kVp @4.2 mAs
What is the ideal cassette size to use for radiographing a Skull (PA projection)?
10X12
What cassette orientation should generally be utilized for a skull PA projection?
lengthwise (portrait)
Should you use a grid/Bucky or tabletop for skull radiography as a standard part of your routine?
grid/Bucky
Identify the central ray location, degree and direction of CR angulation (be specific) and landmarks used to position the CR for a PA Caldwell skull radiograph:
- CR ENTERS ALONG MSP AT 150 CAUDAL ANGLE TO EXIT THE NASION.LANDMARKS: NASION, GONIONS
- CR ENTERS ALONG MSP AT 250 CAUDAL ANGLE TO EXIT THE NASION.LANDMARKS: NASION, INION
- CR ENTERS ALONG MSP AT 100 CAUDAL ANGLE TO EXIT THE NASION.LANDMARKS: NASION, GONIONS
- CR ENTERS ALONG MSP AT 150 CAUDAL ANGLE TO ENTER THE NASION.LANDMARKS: NASION, GONIONS
1
The answer to this statement is true or False:
The two cranial distances are equal on a PA axial image if no rotation is present are the:
Answer: LATERAL ORBITAL WALLS or PETROUS PYRAMIDS or GONIONS
true
How is the CR angulation determined for a PA axial cranial image of a patient who is unable to accurately position the head?
- POSITION THE IOML AS PERPENDICULAR AS POSSIBLE TO IR. ANGLE THE CRPARALLEL WITH PATIENT’S IOML AND ADJUST IT 150 CAUDALLY FROM THISANGLE.
- POSITION THE OML AS PERPENDICULAR AS POSSIBLE TO IR. ANGLE THE CRPARALLEL WITH PATIENT’S OML AND ADJUST IT 150 CAUDALLY FROM THISANGLE.
- POSITION THE OML AS PERPENDICULAR AS POSSIBLE TO IR. ANGLE THE CRPARALLEL WITH PATIENT’S OML AND ADJUST IT 50 CAUDALLY FROM THISANGLE.
2
What is the CR angulation for a PA axial (Caldwell) projection of the facial bones for a patient who can tuck the chin only enough to place the OML at a 10 degree cephalic angle with the IR?
5 Degrees Caudal
What is the CR angulation for an AP axial (Caldwell) projection of the facial bones for a patient who can tuck the chin only enough to place the OML at a 5 degree caudal angle with the IR?
10 Degrees Cephalic
