By Ronald Eisenberg JD MD FACR, Alexander Margulis MD
Clinical imaging now performs an important position in prognosis, number of remedy, and follow-up. although, sufferers are frequently intimidated through the a number of imaging modalities to be had, the symptoms for his or her use, the enforcing apparatus, what the examinations are like and the way lengthy they final, and the benefits and drawbacks of assorted strategies. This booklet is designed to supply motives for those and different matters that allows you to relieve the various nervousness concerning clinical imaging reviews.
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Extra info for A Patient's Guide to Medical Imaging
Restraints or other mobilization devices may be necessary to keep infants and very young children still. This is important, since any sudden movements could blur the image and make it necessary to take a repeat ﬁlm (with added radiation exposure). What Will You Feel? You will not feel anything when the x-ray image is taken. In most cases, the only discomfort you will experience relates to the hardness of the x-ray table. X-ray rooms tend to be kept cool to protect the equipment from overheating, but you will be given a sheet or blanket if requested.
How Is the Test Performed? If you can stand, chest radiography usually consists of two views (frontal and lateral), with you standing against a wall-mounted cassette (Fig. 2-8). Other plain radiographs may be taken with you lying on an examination table (Fig. 2-9). Pillows or sandbags may be used if you need to be placed 2 CONVENTIONAL RADIOLOGY Figure 2-8. Positioning for an upright frontal radiograph of the chest. Figure 2-9. Positioning for a supine frontal radiograph of the abdomen. 29 30 A PATIENT’S GUIDE TO MEDICAL IMAGING at an angle for a special view.
In the United States, more than 150,000 CT studies are performed each day. 5 Americans. Table 1-2 Background Radiation Equivalents of Radiographic Studies Procedure Background radiation Bone densitometry (DEXA) 1 day Mammography 3 months Hysterosalpingography 4 months Spine radiograph 6 months Upper gastrointestinal series 8 months Barium enema 16 months CTomputed (head) 8 months CT (chest or abdomen) 3 years 18 A PATIENT’S GUIDE TO MEDICAL IMAGING The increase in CT examinations is related to the development of multidetector scanners, which can provide exquisitely detailed anatomic studies in a few seconds.