In projection of lumbar vertebrae we select:
- A- Long exposure time with low mA
- B- Long exposure time with high mA
- C- High mA with high KV
- D- Short exposure time with low mA
- E- Increase F.F.D.
The ideal selection for projection of lumbar vertebrae is: D- Short exposure time with low mA
Here's why the other options are not ideal:
A- Long exposure time with low mA:
This would result in a very underexposed image.
B- Long exposure time with high mA:
While this might increase brightness, it would also expose the patient to unnecessary radiation.
C- High mA with high KV:
This would create a very high radiation dose and wouldn't necessarily improve image quality.
E- Increase F.F.D. (Focus-to-Film Distance):
While increasing the FFD can reduce magnification, it's not the primary concern for lumbar vertebrae X-rays.
For lumbar spine X-rays, we aim for a good balance between image quality and minimizing radiation exposure to the patient. A short exposure time with low mA achieves this balance by delivering a focused burst of radiation for a short duration. This reduces the overall radiation dose while still capturing a clear image.
