1		2							3		4
5									6								7
																	8
															9
		10					11
															12
					13
					14
				15
																			16
17		18
								19
						20									21
22															23
					24							25
													26

Across 5. filter used to reject high frequency noise 6. uses 0 and 1 for codes 8. Read Only Memory 10. one of the first reconstruction technique in Nuclear Medicine 12. filter used to rule out low-frequency background 13. requires magnification 14. used on static images to remove statistical fluctuations 19. the brain of a computer 21. unwanted signal 22. uses ferrous material 24. made up of pixels; e.g. 256 x 256 25. highest frequency 26. frequency used to specify bandwidth of a filter

Down 1. Random Access Memory; is temporary 2. spatial and temporal filters 3. most commonly used back projection 4. method of subtracting counts until desired image is obtained 7. strored images built and stored into the computer for preset lenght of time 9. reduces digital raster effect on a static and dynamic image 11. used for dynamic aquisitions 15. all electronic components and gadgetry of a computer 16. equals 8 bits 17. each event is recorded by its existence and location 18. employs numbers as decimals for information 20. uses two pulses having only two discrete voltages 23. central processing unit; rated in megaherz (MHz)