2. If you consider it as one mineral, feldspar is the most common mineral and quartz comes in second, especially when you consider the whole crust, continental plus oceanic crust. Feldspar is called a group of minerals only for the convenience of geologists.he most common mineral of the Earth's continentsâthe world we spend our time inâis quartz, the mineral SiO 2. Nearly all the sand in sandstone, in the deserts of the world and on its riverbeds and beaches is quartz.
Transabdominal Ultrasound. A transabdominal ultrasound is used to look at the pelvic organs. Gel is placed on your abdomen. Then a small, handheld unit called a transducer is gently moved around to view the pelvic organs. The transducer sound waves make a picture on the TV screen.
Additionally, ultrasound technology has advanced to allow for different types of imaging: 1  Doppler is a special type of ultrasound that creates images of blood flow through vessels. 2  Bone sonography helps doctors diagnose osteoporosis.3  Echocardiograms are used to view the heart.4  3D imaging adds another dimension to the ultrasound image, creating ... In a transvaginal ultrasound, a transducer wand is placed in a womanâs vagina to get better images of her uterus and ovaries. 2  A transrectal ultrasound is sometimes used in the diagnosis of prostate conditions.