Measurments Flashcards
What is the normal size/measurment of the sella turcica
16x12mm
What film is the sella turcica measured on
Lateral skull film (40’ FFD)
What is the significance of the sella turcica
Empty sella syndrome
Tumor
Normal
Aneurysm
What measurment is used to detect Platybasia
martins basilar angle
what is the normal range for a normal martins basilar angle
137-152
Greater than 152 is platybasia
What can cause platybasia
Congenital malformality
Bone softening disease (pagets)
What does Chamberlains line detect
Basilar invagination (pathological) Basilar impression (developmental)
The Odontoid should not extend further than how much over Chamberlains line
7mm
The odontid should not extend further than how much above the McGregors line
8-10mm
What does a McGregor line measure
Basilar invagination
Basilar imprassion
What lines measure atlantoaxial impaction
Chamerblains line
McGregors line
Which measurement of atlantoaxial impaction is more accurate
McGregors
What line measures alignment of vertebra using the posteior boundry of the vertebral body
Georges line
what is an anterior misalignment called
Anterolisthesis
What is a posterior misalignment called
Retrolisthesis
