Kilovoltage peak
Updates to Synonym Attributes
Updates to Article Attributes
Kilovoltage peak (kVp) is the peak voltage applied to the X-ray tube. It determines the highest energy of X-ray photon. It is responsible for acceleration of electrons from cathode to anode. It also determines tube current in space charge region.
Increase in kVp shifts the X-ray spectrum to right. The radiation dose to the patient is directly proportional to square of kV. However it must be remembered that in practical purposes whenwhere a different kVp is changedused in different cases (say for e.g low kV in mammography as compared to chest X-ray), other factors like mA and FFD (film focus distance) also changeplay a role and a complex relation exist to the patient dose (patient dose in mammography is much more than a chest X-ray).
-<p><strong>Kilovoltage peak (kVp) </strong>is the peak voltage applied to the <a title="X-ray tube" href="/articles/x-ray-tube-1">X-ray tube</a>. It determines the highest energy of X-ray photon. It is responsible for acceleration of electrons from cathode to anode. It also determines tube current in <a title="space charge effect" href="/articles/space-charge-effect">space charge</a> region. </p><p>Increase in kVp shifts the <a title="X-ray spectrum" href="/articles/x-ray-spectrum">X-ray spectrum</a> to right. The radiation dose to the patient is directly proportional to square of kV. However it must be remembered that in practical purposes when kVp is changed, other factors like mA and FFD (film focus distance) also change and a complex relation exist to the patient dose.</p>- +<p><strong>Kilovoltage peak (kVp) </strong>is the peak voltage applied to the <a href="/articles/x-ray-tube-1">X-ray tube</a>. It determines the highest energy of X-ray photon. It is responsible for acceleration of electrons from cathode to anode. It also determines tube current in <a href="/articles/space-charge-effect">space charge</a> region. </p><p>Increase in kVp shifts the <a href="/articles/x-ray-spectrum">X-ray spectrum</a> to right. The radiation dose to the patient is directly proportional to square of kV. However it must be remembered that in practical purposes where a different kVp is used in different cases (say for e.g low kV in mammography as compared to chest X-ray), other factors like mA and FFD (film focus distance) play a role and a complex relation exist to the patient dose (patient dose in mammography is much more than a chest X-ray).</p>
References changed:
- 1. Curry TS, Dowdey JE, Murry RE. Christensen ́s physics of diagnostic radiology 4 Ed. Lippincott Williams & Wilkins. (1990) ISBN:0812113101. <a href="http://books.google.com/books?vid=ISBN0812113101">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0812113101">Find it at Amazon</a><span class="ref_v3"></span>
Tags changed:
- physics
- x-ray
Sections changed:
- Imaging Technology
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