Final Answer:
The most appropriate technical factors for the radiographic examination shown in Figure 4-30 are 400 mA, 1/30 s, and 72 kV.(Option 1)
Step-by-step explanation:
The selection of appropriate technical factors in radiography is crucial for achieving optimal image quality while minimizing patient exposure. In this scenario, the chosen settings of 400 mA, 1/30 s, and 72 kV offer the best balance.(Option 1)
Firstly, the 400 mA (milliamperes) setting denotes the tube current, determining the quantity of X-rays produced. Higher mA values yield increased radiation output, enhancing image brightness without sacrificing quality. Moreover, the 1/30 s (seconds) exposure time complements the mA setting, ensuring sufficient exposure duration to capture necessary detail without excessive blurring due to patient motion.
The 72 kV (kilovolts) represents the tube potential or voltage applied across the X-ray tube. This voltage determines the energy of the X-ray photons produced. A lower kV setting, like 72, is suitable for soft tissue imaging, maintaining clarity while reducing unnecessary radiation penetration.
To illustrate, the calculation for the exposure in mAs (milliampere-seconds) is obtained by multiplying mA by exposure time (mA × s). Here, 400 mA × 1/30 s = 13.33 mAs, ensuring adequate exposure for image formation. Additionally, the 72 kV setting optimizes contrast for soft tissue examination, aligning with the requirements of the radiographic study.
Therefore, the selection of 400 mA, 1/30 s, and 72 kV in Figure 4-30 aligns with the principles of balancing image quality, exposure, and patient safety for effective radiographic imaging.
Here is complete question;
"Which of the following groups of technical factors would be most appropriate for the radiographic examination shown in Figure 4-30?
1. 400 mA, 1/30 s, 72 kV
2. 300 mA, 1/50 s, 82 kV
3. 300 mA, 1/120 s, 94 kV
4. 50 mA, ¼ s, 72 kV"