### Abstract

The integral dose to the patient and image signal to noise ratio (SNR) are inexorably coupled in x-ray-based diagnostic imaging. Advancements and optimal design of imaging devices need to consider the SNR as well as patient dose. The figure of merit, FOM=(SNR)^{2}/(integral dose), is a useful parameter in optimizing detector designs because it is independent of input exposure, and therefore eliminates exposure as a design consideration. Although numerical calculation of the SNR is relatively straightforward in most cases, the integral dose calculation is made complex due to its scatter component's high dependency on both x-ray energy and patient thickness. Monte Carlo calculations over a range of monoenergetic x-ray energies were used to calculate total energy absorption, and the results are parametrized using polynomial expressions. The results are shown to be applicable to any arbitrary polyenergetic spectrum. An example using the above FOM is given to illustrate the utility of the parametrized results. The parametrized results may prove useful in the computer simulations of x-ray detector systems where the above FOM is utilized.

Original language | English (US) |
---|---|

Pages (from-to) | 1467-1473 |

Number of pages | 7 |

Journal | Medical Physics |

Volume | 19 |

Issue number | 6 |

DOIs | |

State | Published - 1992 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Biophysics

### Cite this

**Parametrized x-ray absorption in diagnostic radiology from Monte Carlo calculations : Implications for x-ray detector design.** / Boone, John M.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - Parametrized x-ray absorption in diagnostic radiology from Monte Carlo calculations

T2 - Implications for x-ray detector design

AU - Boone, John M

PY - 1992

Y1 - 1992

N2 - The integral dose to the patient and image signal to noise ratio (SNR) are inexorably coupled in x-ray-based diagnostic imaging. Advancements and optimal design of imaging devices need to consider the SNR as well as patient dose. The figure of merit, FOM=(SNR)2/(integral dose), is a useful parameter in optimizing detector designs because it is independent of input exposure, and therefore eliminates exposure as a design consideration. Although numerical calculation of the SNR is relatively straightforward in most cases, the integral dose calculation is made complex due to its scatter component's high dependency on both x-ray energy and patient thickness. Monte Carlo calculations over a range of monoenergetic x-ray energies were used to calculate total energy absorption, and the results are parametrized using polynomial expressions. The results are shown to be applicable to any arbitrary polyenergetic spectrum. An example using the above FOM is given to illustrate the utility of the parametrized results. The parametrized results may prove useful in the computer simulations of x-ray detector systems where the above FOM is utilized.

AB - The integral dose to the patient and image signal to noise ratio (SNR) are inexorably coupled in x-ray-based diagnostic imaging. Advancements and optimal design of imaging devices need to consider the SNR as well as patient dose. The figure of merit, FOM=(SNR)2/(integral dose), is a useful parameter in optimizing detector designs because it is independent of input exposure, and therefore eliminates exposure as a design consideration. Although numerical calculation of the SNR is relatively straightforward in most cases, the integral dose calculation is made complex due to its scatter component's high dependency on both x-ray energy and patient thickness. Monte Carlo calculations over a range of monoenergetic x-ray energies were used to calculate total energy absorption, and the results are parametrized using polynomial expressions. The results are shown to be applicable to any arbitrary polyenergetic spectrum. An example using the above FOM is given to illustrate the utility of the parametrized results. The parametrized results may prove useful in the computer simulations of x-ray detector systems where the above FOM is utilized.

UR - http://www.scopus.com/inward/record.url?scp=0026443715&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026443715&partnerID=8YFLogxK

U2 - 10.1118/1.596803

DO - 10.1118/1.596803

M3 - Article

C2 - 1461211

AN - SCOPUS:0026443715

VL - 19

SP - 1467

EP - 1473

JO - Medical Physics

JF - Medical Physics

SN - 0094-2405

IS - 6

ER -