Question

where should the central ray be directed for a posteroanterior (pa) chest radiograph?
○ midcoronal plane (mcp) at the level of t7
○ midsagittal plane (msp) at the level of t7
○ at the level of the scapular spine
○ at the level of the 12th rib

Explanation:

In a PA chest radiograph, the central ray is directed to the midsagittal plane (MSP) at the level of T7 (thoracic vertebra 7), as this aligns with the anatomical center of the chest for proper imaging. The midcoronal plane, scapular spine level, and 12th rib level are not correct for this projection.

Answer:

B. Midsagittal plane (MSP) at the level of T7