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18.09.2014
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The subspecialty of medicine called Radiology was developed from the discovery of the x-ray by Wilhelm Conrad Roentgen in 1895. Magnetic Resonance Imaging (MRI) is a non-invasive procedure using magnetism and radio waves to provide detailed images of your body and its soft tissue structures.
Nuclear Scans provide images of your internal organs and bones not possible with conventional x-rays.
Bone scans can show abnormalities long before they show up in x-rays, which is why your doctor probably ordered one.
A pulmonary function test measures how well your lungs function, specifically how much air your lungs can hold, and how effectively they work. Red cells contain hemoglobin, the molecule that carries oxygen and carbon dioxide in your blood throughout your body. The differential (or diff) refers to the distribution of different kinds of white cells in your blood.
The following chart helps to summarize the important things to know about blood counts.
What this means is blood is drawn from your central line, and sent to the lab to see what type of bacteria grows in the culture medium (a substance that germs grow in).
Blood Pressure Your blood pressure is a measure of the force of your blood against the walls of your arteries. The measurement is written one above the other, with the systolic number on top and the diastolic number on the bottom. Your blood pressure might be taken manually with a blood pressure cuff and a stethoscope or electronically with a digital readout. Usually while taking your temperature or blood pressure, the person taking your vital signs feels your wrist to check your pulse.
Tara Maginnis (of costumes.org fame) putting makeup on herself as she talks and walks you through the process of becoming a character! X-rays are a form of electromagnetic radiation that have high energy and short wavelength and are able to pass through various substances including body tissue. MRI’s help diagnose your disease, monitor the progress of your treatment or help understand other medical situations that arise.
To make you more comfortable, the inside of the scanner is well lit, and has a fan that gently blows fresh air. Instead of being bombarded with X-rays, a low level radioactive compound is injected, swallowed, or inhaled into your body. The radioactive compound is given through an IV and is absorbed by your bones as it travels through your body.


High frequency waves are directed at your body and then reflected (echoed) back to a scanner that creates an image of the area scanned.
If your treatment plan includes anthracyclines, which are potentially damaging to your heart, you will probably have this test done periodically. The electrocardiogram (ECG or EKG) records your heart’s rhythms and electrical impulses through 10 electrodes that are placed on your chest, arms and legs. If your treatment plan includes the drug cisplatinum, you will likely have a number of audiograms. This test is extremely important for accurately diagnosing some types of cancer as well as tracking the progress of your therapy. If your hemoglobin is low, you will be anemic with symptoms like pale skin, shortness of breath, and fatigue. Because cancer treatment affects your body’s ability to produce white cells, your risk of infection becomes very high. It is the percent of neutrophils (segs + bands) multiplied by the total white blood count (WBC). Because chemotherapy affects your bone marrow’s ability to produce platelets, you will probably need platelet transfusions during your treatment. Remember that a fever over 100.5 F or 38.0 C requires a call to your doctor if you are neutropenic! Blood pressure is recorded as two numbers-the systolic pressure (as the heart beats) over the diastolic pressure (as the heart relaxes between beats).
If you notice the person taking your vital signs is staring at you funny while taking your temperature, he or she is probably watching you breath.
The pulse represents the beating of your heart, specifically the ejection of blood from the left ventricle to the general circulation of the body. Even though the technician is in another room during the procedure, he or she can see you at all times and you can see through a mirror positioned at eye level inside the machine.
CAT Scans combine x-rays and computers to produce very detailed cross sectional images of your body. The amount of radiation received from the radioisotope is very low – about the same as from a dental x-ray.
You have to drink a lot of water or juice right after the isotope is injected to clear your body of radioactive material not absorbed by your bones. It accumulates in areas where there is rapid cell growth, such as tumors and sites of infection, helping your doctors make an accurate diagnosis and providing appropriate follow-up.
A possible side effect of cisplatinum is hearing loss so you will probably have a baseline test done prior to starting the drug, and then periodically throughout your treatment. You may have low hemoglobin at diagnosis as well as during treatment because of your bone marrow’s inability to produce new red cells.


In order to know exactly what antibiotics best kill the bacteria, blood cultures might be drawn. Blood tests are also used to track the progression of your disease as well as help make decisions about your treatment.
High or low blood pressure can be an indicator of a serious medical problem, so it is watched closely. If you want, you can usually bring someone with you in the room (check with the technician first). As an example, if your hematocrit is 30 it means that 30% of the blood that was drawn is red cells; the remaining 70% is plasma. The part of your body to be scanned is placed between the x-ray machine (that produces the rays) and a special screen used to obtain the image. The contrast is given through an IV or if you are having an abdominal scan, you may have to drink it. In this position, the bones or vertebrae in your spine separate, letting the needle pass between the vertebrae and into the spinal canal. Some common drugs used are fentanyl and propofol and may be administered by an anesthesiologist.
Some of the treatments you will receive, especially chemotherapy, will also affect your body’s ability to produce blood cells.
Depending on what type of scan is necessary, the table moves you into the machine head or feet first.
Once the body part to be scanned is in the exact center of the magnetic field, the scan begins. Your medical team will tell you exactly what to do after the procedure, but you will usually be told to lie flat on your back for at least an hour to prevent a headache (caused by the temporary imbalance of your spinal fluid).
Even with this precaution, you may still have a headache for several days that is worse when you sit or stand up.
If you are not sedated, you will feel the prick of the needle and the local anesthetic will sting at first. Bone Marrow Procedure A biopsy needle is then inserted through your hip bone into your bone marrow. If you are not asleep, you may feel some pressure and pain as the needle is pushed into your bone.



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