From the Research
Yes, a CT scan of the abdomen and pelvis typically covers the lower ribs. The standard protocol for an abdominal CT scan includes imaging from the diaphragm to the iliac crests, which encompasses the lower portion of the rib cage. Specifically, the scan usually captures ribs 7-12, as these are anatomically associated with the upper abdominal region. The exact coverage may vary slightly depending on the specific protocol used by the radiologist and the clinical indication for the scan. This inclusion of the lower ribs is beneficial as it allows for evaluation of potential rib lesions, fractures, or other abnormalities that might be contributing to abdominal symptoms. Additionally, the lower ribs serve as important anatomical landmarks for radiologists when interpreting abdominal imaging, helping to precisely locate findings in relation to surrounding structures. According to a study published in Radiology 1, extra images were acquired above the dome of the diaphragm in 103 (97%) of 106 examinations, which suggests that the lower ribs are often included in the scan. Another study published in BJR open 2 found that 98% of COVID pathology was identified at the lung bases, which are typically included in a standard CT abdomen and pelvis scan. However, the most recent and highest quality study on this topic is not directly related to the question, so we rely on the general principles of CT scan protocols. In general, the inclusion of the lower ribs in a CT scan of the abdomen and pelvis is a common practice, and it is beneficial for evaluating potential abnormalities in the rib cage and surrounding structures. Some key points to consider when evaluating the coverage of a CT scan of the abdomen and pelvis include:
- The standard protocol for an abdominal CT scan includes imaging from the diaphragm to the iliac crests
- The scan usually captures ribs 7-12, as these are anatomically associated with the upper abdominal region
- The exact coverage may vary slightly depending on the specific protocol used by the radiologist and the clinical indication for the scan
- The inclusion of the lower ribs is beneficial for evaluating potential rib lesions, fractures, or other abnormalities that might be contributing to abdominal symptoms.