Final answer:
Fluoroscopic spot films using conventional cassettes typically use 100 or more mA, are placed between the patient and image intensifier, but have lower resolution than digital photospot cameras. Technological advances in medical imaging such as SPECT have enhanced image contrast and allowed for three-dimensional imaging with the aid of computers.
Step-by-step explanation:
The question pertains to fluoroscopic spot films produced using conventional cassettes, such as those in film/screen or computed radiography (CR) systems, used in medical imaging. Fluoroscopic spot films do typically utilize 100 or more mA to create the image. However, the resolution of these films is often not as superior as that of digital photospot cameras. These conventional cassettes are positioned between the patient and the image intensifier, capturing the image after the x-rays have passed through the patient and have been converted to light by the image intensifier. It's important to note that digital imaging techniques, including digital photospot cameras, provide better image resolution and efficiency compared to conventional film-based systems.
Throughout the evolution of medical imaging, advancements such as single-photon-emission computed tomography (SPECT) and more intricate enhancements have led to improved contrast and three-dimensional imaging capabilities. Despite the lower spatial resolution of about 1 cm, SPECT offers good contrast, particularly when compared to older imaging techniques. These advanced methods integrate data analyzed by computers to produce detailed, often three-dimensional images. Modern medical imaging has moved beyond simple film radiography, but the principles of detecting ionizing radiation remain similar.