The roentgenographic method of diagnosis of accessory sinusitis is applicable not only to maxillary sinus but also ethmoidal, frontal, or sphenoidal sinuses, the reduction of bone figure following the increase of voltages in roentgen tube can be considered under an assumption of additive action to co-operative interrelation of bone, brain and muscle, such as the simplifying of complicated bone shadow, the swelling of soft tissue and of mucous membrane of accessory cavity as a pneumatic hole, the intrasinual fluids, and the air
After the comparison of usual low-voltage roentgenogram with high-voltage roentgenogram, it was summerized from one case that the operative findings coincided more sufficiently in high-voltage roentgenogram than in low-voltage one, the former being precisely described.
The authors emphasize that the facial high-voltage roentgenography chiefly to accessory sinuses, according to the experimental data up to the present, gives a clear shadow of accessory sinus, as mintioned above, and also of the bony structure, in 140 Kv and in simultaneous use of alminium filter of 1.0 mm.
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