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ct final romans
ct final
| Question | Answer facial edema, ur= |
|---|---|
| gantry rotation speed | the technical parameter controlling a CT system of temporal resolution It is how fast the gantry rotates and how fast the images are taken. |
| Pitch | described as the movement of the table throughout a helical scan divided by slice thickness |
| collimation | the dimension of the CT slice along the longitudinal detector configuration |
| Reconstruced slice thickness | performed after the initial prospective reconstruction to slice thickness |
| Slice interval | the distance between the center of one CT section and the center of the next adjacent section |
| Because the data selected for SFOV are a subset of all the scan data available the SFOV cannot be larger than the DFOV | False because the DFOV can not be larger thaen the SFOV |
| Comparing the reported rate of adverse reaction | LOCM are much lower than HOCM by a factore of approximately 4 to 5 times |
| Contrast reactions taht are accompanied by a temporary drop in blood pressue, facial edema, bronchospasm,laryngeal edema are | moderate reactions |
| A increase in KVP_______image noise and ____radiation dose if other parameters are held constant | decrease, increases |
| Image noise will decrease with an _____kvp and ____radiation dose if other parameters are held constant. | increase, increase |
| what is the normal BUN | 7-25mg/dl |
| What is the normal creatinine | .6-1.7mg/dl |
| what as a general rule, is the normal range for prothrombin time PT | 11-14 sec |
| range of adult pulse | 60-100 |
| In CT, enhancement fallsm into two main categories intravascular and ___ | GI |
| Discuss contrast- induced nephropathy including risk factors and strategies for prevention | CIN chemotoxic reation diabetic dehydrated. prevention kidney use isomolar contrast small amount of contrasr |
| What health conditions would warrant a positive screen for a patient undergoing a CT exam with contrast. | Positive screen for any indication would possible be med and ct |
| What is the difference between basic and informed consent | basic is for a noninvasive procedure, informed is for a less invassive procedure, |
| Explain how variations in contrast dose and flow rate affect aortic enhancement. | Flow rate increase as time decrease. |
| List three criteria that could be present for a diagnosis of appendicitis | abdominal pain, ratty appearance around the appendix, high wbc. |
| Why is multiphase imaging important when image tumores of the liver | because a noncontrast study will nost see the difference in the surrounding tissue of the liver |
| Why is it important to use a low attentuation contrast when 3-D imaging is necessary | because low attentuation contrast will not obsecure the difference in density of tissue |
| What can be done to reduce the radiation dose of the patient of a ct exam for the diagnosis of urinary tract caliculi | reduce the mA to 100 |
| List the reasons CT examinations of the abdomen and pelvis require greater attention to patient preparation than evualuation of any other area of the body | differene of densiies of structures with in he abdomen. Clear fluids and being NPO is essential. Bowel could be diagnosis as antoher disease. |
| List two contrasts that are excellent low attentuation contrast | water and air |
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