A、前屏0.1-0.15mm,后屏0.15-0.50mm B、前屏0.4-0.6mm,后屏0.6-0.8mm C、前屏0.02-0.04mm,后屏0.08-0.10mm D、前屏2-4mm,后屏3-5mm
A、前屏0.02-0.10mm,后屏0.02-0.10mm B、前屏0.04-0.15mm,后屏0.04-0.15mm C、前屏0.001-0.003mm,后屏0.004-0.006mm D、前屏1.1-1.4mm,后屏1.5-2.0mm
A、用熒光增感屏進(jìn)行X射線(xiàn)照相時(shí),曝光時(shí)間可以顯著縮短,但底片的像質(zhì)較差 B、熒光增感屏的增感作用不如鉛箔增感屏 C、用鉛箔增感屏?xí)r,若X射線(xiàn)管的管電壓太高,會(huì)產(chǎn)生磷光現(xiàn)象 D、用熒光增感屏進(jìn)行X射線(xiàn)照相時(shí),曝光時(shí)間雖然較長(zhǎng),但底片的像質(zhì)較好