Calcium is the most abundant mineral in your body. It is essential for the development and maintenance of strong bones and teeth, where about 99% of the body's calcium is found.Calcium also helps the heart, nerves, muscles, and other body systems work properly.t is essential for the development and maintenance of strong bones and teeth, where about 99% of the body's calcium is found. Calcium also helps the heart, nerves, muscles, and other body systems work properly.
Hysterosalpingogram. A hysterosalpingogram (HSG) is an X-ray test that looks at the inside of the uterus and fallopian tubes and the area around them. It often is done for women who are having a hard time becoming pregnant (infertile).
A myelogram is an invasive diagnostic test that uses x-rays to examine the spinal canal. A special dye is injected into the spinal canal through a hollow needle. An x-ray fluoroscope then records the images formed by the dye. Myelograms can show conditions affecting the spinal cord and nerves within the spinal canal.he dye (contrast agent) used in a myelogram shows up white on the x-ray allowing the doctor to view the spinal cord, exiting nerves, and canal in detail (Fig. 1). The doctor inserts a hollow needle through your skin into the spinal canal (see lumbar puncture).