FREE RADIOLOGY AND STUDY GAMES ABOUT CRANIUM

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SKULL EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -35 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Which focal spot is used for skull projections?

Answer:

Small focal spot.Question 2: Where is the CR centered for a lateral skull? Where is the CR centered for a lateral projection of the Sellae Turcica?

Answer:

2" superior to the EAM, halfway between the Frontal Eminence and the Inion, or $5 degrees anterosuperior (diagonal) from the TEA. For the Sella Turcica the CR should be centered 3/4" anterosuperior to the EAM.Question 3: Which imaging modality is usually performed on neonates with a possible intracranial hemmorhage?

Answer:

Ultrasound

Question 4: On a properly positioned AP Axial (Towne's Method) projection, where should the Dorsum Sellae be placed into the middle aspect of?

Answer:

Foramen Magnum Question 5: What positioning lines can be used to position skull directly in the center of the IR for a lateral skull?

Answer:

Aligning the IOML parallel to the transverse axis of the IR Question 6: For the PA Axial (Caldwell) method, how much and which direction should the CR be angled? Where should it be centered?

Answer:

CR angled 15 degrees caudad to the OML. The CR should exit at the Nasion.Question 7: What alternate projection can be used on a trauma/unconcious patient instead of a PA Axial (Caldwell) skull? How much and which direction is the CR angled? Where is it centered?

Answer:

The Reverse Caldwell. AP Axial skull. The CR is angled 15 degrees cephalic to the OML and centered at the Nasion.Question 8: Why must a paient be cleared from a X-table lateral C-spine prior to performing a x-table lateral skull?

Answer:

Because the patient's head must be lifted up to place a sponge underneath the patient's head for the x-table lateral skull.Question 9: What is the Haas Method (WHich projection and CR angle)? Which level should the CR exit at?

Answer:

A PA axial skull with the CR angled 25-30 degrees cephalic. CR should exit 1 1/2" superior to the Nasion.

Question 10: What is the general centeriong point for the CR on a lateral skull?

Answer:

CR centered 45 degrees anterosuperior 1" from TEA (diagonal).

Question 11: What is a destructive lesion with irregular margins?

Answer:

Osteolytic Neoplasm Question 12: Where will the Petrous Ridges be projected with a 15 degree PA axial (Caldwell) projection on the cranium.

Answer:

In the lower 3rd of the orbits.Question 13: What is a fracture that may produce an air-fluid level in the sphenoid sinus?

Answer:

Basal Skull Fracture

Question 14: Does Paget's disease require an increase in exposure factors?

Answer:

Yes

Question 15: Which skull projection best demonstrates the Clivus in profile?

Answer:

Lateral Question 16: Which specific positioning error(s) is/are present if the Petrous Ridges are projected higher in the orbits then expected for a 15 degree axial projection. What is the positioning error if there's lack of symmetry of the Petrous ridges?

Answer:

Excessive flexion at the neck, or too much angle on CR. Rotation.

Question 17: What's the name for a tumor that originates in the bone marrow?

Answer:

Multiple Myeloma

Question 18: Which skull projection best demonstrates the Sella Turcica in profile?

Answer:

Lateral skull.Question 19: What CR angle must be maintained for the AP Axial (Towne's Method) projection?How much angle should be used when positioning the IOML perpendicular to the IR? Where is the centering for the Towne's? Which part should the CR traverse through?

Answer:

30 degrees caudad to the OML? 37 degrees caudad.Center to the mid sagittal plane 2 1/2 " superior to the Glabella, or 1 1/2" superior to the Superciliary Arch. Through the Sellae Turcica (3/4" anterosuperior to EAM) Question 20: What is used as the primary control of rotation for a true lateral skull? What is used as 2ndry?

Answer:

Aligning Mid Sagittal Plane parallel to the IR is primary. The Glabella and Inion should be equal distance to the IR.Question 21: When using a 30 degree caudad angle for the AP axial (Towne Method) projection of the skull, which positioning line should be perpendicular to the IR? Which cranial bone is best demonstrated with the Towne Method?

Answer:

The OML (OrbitoMeatal Line). The Occipital bone.Question 22: What can be assessed on the PA Axial (Caldwell) and AP Axial (Reverse Caldwell) radiograph's to be sure the patient and CR is in the correct position? What can be done to correct it?

Answer:

The Petrous Pyramids should be projected into the lower 1/3 of the orbits. CR angle may be too little, or too much. Or the OML may not be truly perpendicular to the IR.Question 23: Where is the CR centered for a lateral of the Sella Turcica? What will be demonstrated to tell if I've centered the CR correctly?

Answer:

3/4" anterior & 3/4 superior to EAM. Will demonstrate the anterior & posterior Clinoid process with no divergence.