Imaging Flashcards
Approach to reading Xray?
Drs abcdefg
Details
RIPE: rotation, inspiration, picture (ap vs pa ), exposure (penetration)
Soft tissue and bones
Airway
Bones
Cardiac shadow
Diaphragm
Effusions and extras (hardware)
Fields (lung)
Gastric bubble
See picture 6 and label shenton’s line iliopectineal line, ilioischial line, teardrop sign
See picture 7
Blue = shenton
Green = iliopectineal
Yellow = ilioischial
Red = teardrop
See picture 8 and label the lines for interpretation of c spine xr (5)
See picture 9
Pink= prevertebral soft tissue shadow : between c2-c4 shouldn’t be > 3-5 mm
Blue = anterior vertebral body line :must be in lordosis, smooth, parallel.
Green = posterior vertebral body line
Yellow - spinolaminar line
Black = posterior spinous line. Must converge at 1 point.
How assess rotation on CXR?
Distance between clavicular heads must be equal distances from thorace vertebral spinous processes
How assess for adequate inspiration on CXR ?
At least 10 ics must be seen (for trauma 9 is fine )
Pa vs ap view CXR ? (Technique, quality, scapula, ribs, clavicles)
Pa standing up at radiology department, ap at bedside with portable machine
Pa better quality and can more accurately assess heart size, ap worse quality and often make mediastinum look wide when it is not.
Pa scapula in thorax periphery, ap seen over lung fields
Pa posterior ribs distinct, ap anterior ribs
Pa clavicles project over lung fields, Ap above apex
What is enlarged cardiac shadow on CXR measurement ?
> 50% mediastinum
Correct position gastric bubble on CXR ?
Left diaphragm
See picture 10 and label the normal CXR
See picture 11
What does fracture of ribs 1 and 2 usually indicate?
Severe force and potentially severe injury
Possible complication fracture ribs 4-9?
Pneumothorax, hemothorax
Possible complication fracture ribs 1-12? (2)
Liver or spleen lacerations, diaphragm injury
What is, causes and is the onset of pulmonary contusion?
Haemorrhage into lungs
Most common finding in blunt chest trauma
Appears within 6 h injury and resolve within 48h.
See picture 12 and diagnose pathology.
Flail chest
See picture 13 and diagnose pathology.
Lung contusion R
See picture 17 and diagnose pathology. (3)
• Tension pneumothorax L
• fractures ribs 3-5 posteriorly and associated subcutaneous emphysema
. Fracture mid third left clavicle
See picture 18 and diagnose pathology.
Pneumomediastinum
Mediastinal pleura displaced from left heart border and continuous diaphragm sign
See picture 19 and diagnose pathology.
Pneumopericardium
See picture 20 and diagnose
Haemothorax
See picture 21 and diagnose pathology.
Haemothorax
See picture 22 and diagnose pathology
Widened mediastinum (top) and cardiomegaly
See picture 23 diagnose pathology. (3)
• Diaphragm rupture
• herniation bowel through diaphragm L
• resulting in mediastinal shift to right.
See picture 24 and diagnose pathology.
Subcutaneous emphysema
See picture 25 and diagnose pathology.
Haemopneumothorax. Perfectly straight line due to mixture air and fluid
Name 3 indications emergency Ct abdo
• stable with acute abdo
• free air/fluid
• surgery planning
Which 2 imaging investigations are mandatory in trauma?
Cxr and pxr
What kind of ct done in trauma?
Iv contrast enhancement, except in tbi
What type of scan best for cervical spine if indicated?
Ct- plain radiograph poor diagnostic value. Only do if spine stable.
When should Lodox stat scan be used?
End of primany survey before commence secondary survey to id major injuries
Which areas should be assessed with efast?
• 2x lung fields for pneumothorax
• right upper quadrant for free air
• left upper quadrant
• subcostal
• pelvis
Most common place for free fluid in right upper quadrant on eFAST?
Morrison’s pouch - hepatorenal recess / subhepatic space
How tell If pneumothorax on eFAST?
Presence of pleural sliding line normal. Absence = pneumothorax
Name 10 pitfalls of eFAST in trauma
1.operator, equipment, patient dependant
2. Making management decisions on indeterminate or suboptimal images
3. Bowel gas
4. Artefacts
5. Blood clots vs FF
6. Delay resuscitation
7. Binary question vs specific injury
8. No serial scans
9. Non-traumatic fluid collections
10. Retroperitoneal space can’t see
According to the Canadian Ct head rule, it’s only required for minor head injury patients with any one of which findings? (7)
High risk (for neurological intervention)
1. GCS < 15 at 2 hours after injury
2. Suspected open or depressed skull fracture
3. Any sign of basal skull fracture
4 vomiting ≥ 2 episodes
5-age ≥ 65
Medium risk for brain injury on Ct
6. Amnesia before impact ≥ 30 min
7. Dangerous mechanism (pedestrian, occupant ejected, fall from elevation ≥ 3 feet or 5 stairs)
To which patients does the Canadian Ct head rule not apply? (5)
• Non-trauma cases
. GCS <13
• age < 16
• Coumadin or bleeding disorder
• obvious open skull fracture
Identify pathology picture 37
Compression fracture
Identify pathology picture 38
Compression fracture
Identify pathology picture 39
Compression fracture
Identify pathology picture 40
Compression fracture
Identify pathology picture 41
Burst fracture
Identify pathology picture 42
Burst fracture
Identify pathology picture 44
Flexion distraction injury lumbar
Identify pathology picture 47
Fracture dislocation and spinal cord compression
Identify pathology picture 48
Fracture dislocation
Identify pathology picture 50
Lisfranc injury
Identify pathology picture 51
Extradural haematoma- lenticular shape hyperdensity
Identify pathology picture 52
Intraventricular haemorrhage
Identify pathology picture 53
Pseudo-aneurysm on Ct angio
Identify pathology picture 54
Subdural haemorrhage acute and chronic
Identify pathology picture 55
Tile pelvic fracture type c: rotationally and vertically unstable
Label picture 56
See picture 57
Identify pathology picture 58
Knee dislocation
Identify pathology picture 59
Salter Harris 1 (physis separations) fracture
Identify pathology picture 60
Ruptured diaphragm - air bubble and NGT in L hemithorax
Identify pathology picture 61
Anterior knee dislocation
Identify pathology picture 63
Posterior knee dislocation
Identify pathology picture 65
Torus or buckle fracture
Identify pathology picture 66
Plastic ulna deformity (bowing) with radial head dislocation