Dr Steven Mendelsohn
Chief Executive Officer/Medical Director
Zwanger-Pesiri Radiology, New York, USA
Senior Medical Practice Assistant
Airport Medical Center – Zurich, Switzerland
A total of 354 patients participated in the study, with an age range of 17 to 94 (Fig.
1). Examinations were carried out on 190 male patients and 164 female
In 74 cases only PA images were taken and in 280 cases two-plane images. The exposure parameters were 117 kV for PA, 125 kV for lateral X-rays with automatic exposure, anti-scatter grid r = 8:1, f0 = 180 cm, 52 L/cm.
The dose area products of all examinations were calculated in cGy x cm2 and the effective dose for the individual X-ray was estimated from this using the conversion factor (0.002).
The BMI was calculated for 275 patients from this collective and was between 18 and 44 (Fig. 2)
For both the PA and lateral images, the dose area products for all BMI values were
clearly below the current German dose reference value of 16 cGy x cm2 or 55 cGy x cm2
for lateral images.
The average dose area product for PA images in this collective was 6.44 cGy x cm2 and for lateral images was 16.01 cGy x cm2 (Figs. 3 and 4). The average effective dose for a PA thorax X-ray in the collective was 0.013 mSv and for a two-plane X-ray was 0.046 mSv.
The lowest dose area product with a BMI of 18 was 3.1 for PA and 5.02 cGy x cm2 for lateral. In this case the effective dose for the complete examination was 0.016 mSv. The maximum dose area product for a PA image was 14.7 cGy x cm2, and correspondingly the dose area product for a lateral image in this case was 36.3 cGy x cm2.
Here the effective dose was 0.1 mSv for the complete examination. The image quality was assessed in line with the quality requirements of the guidelines published by the Bundesärztekammer on quality assurance in diagnostic radiology.
* Testing with board certified Radiologists has determined that Cesium Bromide (CR) and Cesium Iodide (DR) Detectors when used with MUSICA processing can provide dose reductions between 50 to 60% when compared to traditional Barium Fluoro Bromide CR systems. Contact Agfa for more details.