Quiz 1 Flashcards
What is the minimal diagnosis series for the cervical spine?
AP
APOM
Lateral
What is the minimal diagnostic series for the chest?
PA
Left Lateral
Why? So that structures are closer to the cassette
What should sinuses look like?
Lucent — dark colored, filled with air
What is the normal value for the prevertebral soft tissue diameter at level C6?
22mm
Remember rule of 2s and 6s:
- At C2 < 6mm
- At C6 < 22mm
What is the normal value for the prevertebral soft tissue diameter at level C2?
6mm
Remember rule of 2s and 6s:
- At C2 < 6mm
- At C6 < 22mm
What is the retropharyngeal vertebral levels?
Down to C2
What is the retrolaryngeal vertebral levels?
C3 to C5
What is the retrotracheal vertebral levels?
C6 and below
Which is a normal site of physiological calcification? (Choose all that apply.)
A. Stylohyoid ligament
B. Thyroid gland
C. Tracheal rings
D. Cricoid cartilage
E. Costal cartilage
F. Michael ligament
G. Pineal gland
Select all EXCEPT B — if the thyroid gland is calcified, it would be pathological.
From our notes: on the lateral view calcification is usually seen most prominently at the anterior and posterior margins of the thyroid and cricoid cartilages and anterior margins of tracheal rings. Arytenoid cartilage calcification often appears as very dense spots of calcification at the posterior, superior aspect of cricoid cartilage.
Calcification of which cartilages is normal and has NO clinical significance?
Thyroid
Cricoid
Arytenoid
Tracheal rings
(Epiglottis cartilage does not calcify.)
Overlying rib 1 cartilage calcification of this structure may simulate pathology:
Lung apices
On the PA chest view, how do we know the patient was exposed on full inspiration?
A. Count ribs
B. Level of hemidiaphragms
C. Widened rib inter-space
D. Pulmonary bronchovasculature
A. Count ribs
On PA, want to see posterior Rib 10 above the hemidiaphragm
What are some things to check for if questioning the diagnostic quality of a chest film?
- Adequate inspiration (mid right hemidiaphragm at rib 10 posterior)
- Entire lung field visualized (apex, lateral, CP angels)
- Adequate film density/ contrast (IVD spaces faintly visible through heart shadow)
- Proper positioning (No rotation — check proximal clavicles)
Which hemidiaphragm is normally higher?
Right (though if they are equal, that is OK)
Why is the right hemidiaphragm higher (or equal) than the left?
Because the right lobe of the liver (I THINK — I couldn’t hear the student who answered in the Panopto)
What is the correct cardiothoracic ratio?
A. Width of heart less than or equal to 3/4 of thoracic cavity
B. Width of heart equal to 3/4 of thoracic cavity
C. Width of heart equal to 1/2 of thoracic cavity
D. Width of heart less than or equal to 1/2 of thoracic cavity
D
Pulmonary vasculature vessels branching and tapering bilaterally.
Central 1/3 vessels are less than ____ in diameter
1 cm (C in the photo)
Note: this is the only cm measurement for these vessels
Pulmonary vasculature vessels branching and tapering bilaterally.
Middle 1/3 vessels are less than ____ in diameter
7-8 mm (M in photo)
Pulmonary vasculature vessels branching and tapering bilaterally.
Peripheral 1/3 vessels are less than ____ in diameter
5 mm (P in photo)
What views can the horizontal fissure be seen?
A. PA only
B. Lateral only
C. PA and Lateral
C.
On PA, extends medial to lateral at level of anterior 4th rib. On Lateral (see photo), extends from oblique fissure anterior to chest wall.
What is the most common accessory fissure?
A. Left horizontal fissure
B. Inferior accessory
C. Superior accessory
D. Azygous
D
Note: accessory fissures include azygous, superior, inferior
