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RADT 316

Positioning unit 3

CR for AP knee 1/2" below patellar apex
the patellar apex is ____ to the patellar base inferior
For an ASIS to tabletop measurement of 26", angle the CR ______ for an AP knee cephalad
For an ASIS to tabletop measurement of 20", angle the CR _____ for an AP knee perpendicular
For an ASIS to tabletop measurement of 17", angle the CR ____ for an AP knee caudal
The distal aspect of the femur angles 5-7 degrees inferiorly going from the ____ to ____ aspect. lateral, medial
deep depression that separates the femoral condyles intercondylar fossa
raised bony area that receives the tendon of the adductor msucle adductor tubercle
This landmark is useful in determining under or over-rotation in the knee image adductor tubercle
most knee injuries are not fractures but _____ torn ligaments
fibrocartilage disks in the knee meniscus
function of the meniscus provides stability and act as shock absorber
sac like structures filled with synovial fluid that allow for smooth articulations between ligaments bursa
film size/orientation for AP knee 10x12 lengthwise
CR angle for a PA projection of the knee five degree caudal
film size/orientation for PA knee 10x12 lengthwise
patient on affected side with knee flexed 20-30 degrees with CR angled 5-7 degree cephalic centered 1"distal to medial epicondyle mediolateral knee
degree of flexion you should not exceed in suspected or known healing patellar fxs ten
film size/orientation for lateral knee 10x12 lengthwise
femoreal condyles should be _____ in the lateral knee image superimposed
CR centered perpendicular to 1/2" below apices of the patellae and MSP AP standing knees
t/f: It is acceptable to leave the patient's shoes on for weight bearing knees false
film size/orientation for AP standing knees 14x17 crosswise
degree of obliquity for AP oblique knees 45
t/f: you still follow the ASIS to tabletop measurement rule for oblique knees true
film size/orientation for oblique knees 10x12 lengthwise
oblique that is useful for seeing the patella projected slightly beyond the edge of the lateral femoral condyle and the fibula superimposed over the lateral half of the tibia lateral oblique
oblique that is useful in seeing the tibia and fibula separated at their proximal articulation - tib/fib joint visualized and patellar margin projecting slightly beyond the medial side of the femoral condyle medial oblique
in the _____ method for intercondylar fossa imaging the tibia is parallel to the image receptor homblad
the knee is flexed_____ degrees in all positions of the homblad method 60-70
CR is directed ______ to the tibia for the homblad method perpendicular
in the ____ method for intercondylar fossa, the femur is parallel to the image receptor camp-coventry
the knee is flexed _____ in the camp coventry method for intercondylar fossa 40-50
CR is directed ______ to the tibia in the camp coventry method perpendicular
patient is in a ____ position for the camp coventry position prone
in the _____ method, the knee is flexed 40-45 degrees with the patient supine beclere
CR is directed _____ to the tibia in the beclere method perpendicular
patellas should be performed in the ____ position if possible to minimize _____ prone, OID
CR is directed _____________ for the PA patella to the midpopliteal area
patella should be _____ to the IR for PA patella parallel`
knee should be flexed_____ degrees for lateral projection of patella 5-10
CR enters ______ for lateral patella midpatellofemoral joint
Patient is in a ____ position for the Hughston method prone
The knee is flexed ____ degrees for the hughston method 50-60
the CR is angled ____ degrees cephalic for the hughston method 45
the CR is angle _____ degrees for the lateral patella 0
the CR is angled ____ degrees for the PA patella 0
the knee should be flexed ____ degrees for the settagast method 90
the CR is directed ____ to patellofemoral joint space perpendicular
t/f: shielding is not needed for any knee or patella image false
for the ____ method, the knee should be flexed until the patella is perpendicular to the IR Hobbs
for the ____ method, the knee is flexed anywhere from 30-90 degrees with the quadricep muscles relaxed for patellar imaging merchant
If the knee is flexed 40 degrees, your CR shothe most common type of primary cancerous bone tumor affecting persons age 40-70 and occurs in various parts of the bodyuld form an angle of ____ degrees with the femur 30
benign, neoplastic bone lesions filled with clear fluid that most often occur near the knee joint in children and adolescents bone cysts
involves a softening of the cartilage under the patella which results in wearing away of this cartilage, causing pain and tenderness in this area chondromalacia patellae
also known as runner's knee chondromalacia patellae
malignant tumors of the cartilage that occur in the pelvis and long bones of men older than 45 chondrosarcoma
slo-growing benign tumor that is found in small bones of the hands and feet enchondroma
a common primary malignant bone tumor that arises from bone marrow in children and young adults ewing's sarcoma
benign neoplastic bone lesion that is caused by consolidated overproduction of bone at a joint (usually the knee) exostosis/osteochondroma
breaks in the structure of bone caused by a force fxs
a form of arthritis that may be hereditary in which uric acid appears in excessive quantities in the blood and may be deposited in the joints and other tissues gout
occur as accumulated fluid in the joint cavity joint effusion
the most common type of primary cancerous bone tumor affecting persons age 40-70 and occurs in various parts of the body multiple myeloma
inflammation of the bone and cartilage of the anterior proximal tibia and is most common in boys ages 10-15 osgood-schlatter disease
also called degenerative joint disease osteoarthritis
gradual deterioration of the articular cartilage with hypertrophic bone formation osteoarthritis
benign lesions that typically occur in long bones of young adults (prox. tibia and distal femur) osteoclastomas
also called giant cell tumors osteoclastomas
highly malignant primary bone tumor osteogenic sarcoma
literally means bone softening - caused from lack of bone mineralization resulting from a deficiency of vitamin D osteomalacia
also called rickets osteomalacia
one of the most common diseases of the skeleton; occurs most commonly in midlife men; disrupts new bone growth resulting in overproduction of very dense yet soft bone - appears as lytic or lucent areas on a radiograph paget's disease
the CR is directed ____ for the AP Tib/Fib perpendicular
the light field should extend _____ beyond each joint to ensure its visibility on the radiograph one to two inches
the CR is centered to the __________ for the AP tib/fib midpoint of leg
t/f: you should image both joints (separately if need be) when imaging the tib fib true
The oblique tib fib should be rotated _____ degrees. 45
In order to image both joints on a diagonally orientated image receptor, the SID should be _____. increased to 44-48"
The CR should be centered to the _______ for an oblique tib fib midpoint of leg
The CR should be centered to the ______ for a lateral tib fib midpoint of leg
All tib fib imaging initially should occur on a _____ image receptor unless imaging a pediatric patient 14x17
What is another term for intercondyloid eminence? intercondylar tubercles
What is the name of the deep depression found on the posterior aspect of the distal femur? intercondylar fossa
A line drawn across the most distal aspect of the medial and lateral femoral condyles would be ______ from being at a right angle (90 degrees) to the long axis of the femur. 5-7 degrees
The upper, or superior, portion of the patella is called the: base
Which two ligaments of the knee joint help stabilize the knee from the anterior and posterior perspective? cruciates
Which structures serve as shock absorbers within the knee joint? menisci
Which one of the following conditions may cause the tibial tuberosity to be pulled away from the tibial shaft? Gout, osteomalacia, reiter syndrome, osgood-schlatter disease osgood-schlatter disease
What is the common term for chondromalacia patellae? runner's knee
Which imaginary plane should be parallel to the IR for an AP projection of the knee? interepicondylar
Which joint space should be open or almost open for a well-positioned AP oblique knee projection with medial rotation? proximal tibiofibular
t/f: A 5-7 degree cephalad angle of the CR for a lateral projection of the knee helps superimpose the distal borders of the medial and lateral condyles of the femur. true
Why is the PA projection of the patella preferred over an AP projection? less OID, less magnification of patella, and less distortion of patella
SITUATION: A projection is preformed for the patellofemoral joint with the patient supine and the knee flexed 40. The CR is angled 30 degrees caudad from horizontal. The IR is resting on the lower legs supported by a special IR-holding device. bilateral merchant
What is the major disadvantage of the Settegast method? requires overflexion of knee
SITUATION: A radiograph of an AP knee reveals that the joint spaces are not equally open and the proximal fibula is superimposed over the tibia. Which specific positioning error lead to this lead to this radiographic outcome? lateral rotation of lower limb
A rad of the Camp-Coventry method was used but the intercondylar fossa is not open&forshortened The following positioning factors were used: prone, lower leg flexed 45 degrees&CR angled 30 caudadĀ¢ered to the popliteal crease Which would cause to repeat increase angle to 45 degree caudad
SITUATION: A bilateral patellofemoral joint space study is ordered. The patient is parapelegic and cannot stand. Which of the following projections would be best for this patient? superinferior (sitting) tangential
Created by: meechthebeech91