### Abstract

This study examined SPECT-reconstructed image quality as a function of the number of views, and determined the minimum number of views necessary to remove aliasing artifacts in 360° SPECT. Methods: Computer simulation was performed using a two-dimensional Shepp-Logan head phantom and a high- resolution parallel-beam collimator with and without photon attenuation. Results: In 360° SPECT, aliasing artifacts were reduced by changing the number of views from an even number 16 to its neighboring odd numbers 15 or 17, from 32 to 31 or 33 and from 64 to 63 or 65. Image quality of 15 or 17 views, 31 or 33 views and 63 or 65 views was similar to that of 32, 64 and 128 views, respectively. Conclusion: Replacing an even number of views by its neighboring odd numbers in 360° SPECT significantly decreased aliasing artifacts. Thirty-one or 33 views are sufficient to remove most of the aliasing artifacts in 360° SPECT with a matrix of 64 x 64 pixels. This method can be applied to fast 360° SPECT since fewer views are used.

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

Pages (from-to) | 1740-1744 |

Number of pages | 5 |

Journal | Journal of Nuclear Medicine |

Volume | 37 |

Issue number | 10 |

State | Published - Jan 1 1996 |

### Fingerprint

### Keywords

- aliasing artifact
- image reconstruction
- SPECT

### ASJC Scopus subject areas

- Radiological and Ultrasound Technology

### Cite this

*Journal of Nuclear Medicine*,

*37*(10), 1740-1744.

**Optimal number of views in 360° SPECT imaging.** / Cao, Zongjian; Holder, Lawrence E.; Chen, Charles C.

Research output: Contribution to journal › Article

*Journal of Nuclear Medicine*, vol. 37, no. 10, pp. 1740-1744.

}

TY - JOUR

T1 - Optimal number of views in 360° SPECT imaging

AU - Cao, Zongjian

AU - Holder, Lawrence E.

AU - Chen, Charles C.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - This study examined SPECT-reconstructed image quality as a function of the number of views, and determined the minimum number of views necessary to remove aliasing artifacts in 360° SPECT. Methods: Computer simulation was performed using a two-dimensional Shepp-Logan head phantom and a high- resolution parallel-beam collimator with and without photon attenuation. Results: In 360° SPECT, aliasing artifacts were reduced by changing the number of views from an even number 16 to its neighboring odd numbers 15 or 17, from 32 to 31 or 33 and from 64 to 63 or 65. Image quality of 15 or 17 views, 31 or 33 views and 63 or 65 views was similar to that of 32, 64 and 128 views, respectively. Conclusion: Replacing an even number of views by its neighboring odd numbers in 360° SPECT significantly decreased aliasing artifacts. Thirty-one or 33 views are sufficient to remove most of the aliasing artifacts in 360° SPECT with a matrix of 64 x 64 pixels. This method can be applied to fast 360° SPECT since fewer views are used.

AB - This study examined SPECT-reconstructed image quality as a function of the number of views, and determined the minimum number of views necessary to remove aliasing artifacts in 360° SPECT. Methods: Computer simulation was performed using a two-dimensional Shepp-Logan head phantom and a high- resolution parallel-beam collimator with and without photon attenuation. Results: In 360° SPECT, aliasing artifacts were reduced by changing the number of views from an even number 16 to its neighboring odd numbers 15 or 17, from 32 to 31 or 33 and from 64 to 63 or 65. Image quality of 15 or 17 views, 31 or 33 views and 63 or 65 views was similar to that of 32, 64 and 128 views, respectively. Conclusion: Replacing an even number of views by its neighboring odd numbers in 360° SPECT significantly decreased aliasing artifacts. Thirty-one or 33 views are sufficient to remove most of the aliasing artifacts in 360° SPECT with a matrix of 64 x 64 pixels. This method can be applied to fast 360° SPECT since fewer views are used.

KW - aliasing artifact

KW - image reconstruction

KW - SPECT

UR - http://www.scopus.com/inward/record.url?scp=0029817008&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029817008&partnerID=8YFLogxK

M3 - Article

C2 - 8862322

AN - SCOPUS:0029817008

VL - 37

SP - 1740

EP - 1744

JO - Journal of Nuclear Medicine

JF - Journal of Nuclear Medicine

SN - 0161-5505

IS - 10

ER -