{"chart":"nuclear-medicine-decay-chart","generatedFrom":"All Unit Conversions shared conversion library","tables":[{"title":"Half-lives of common medical radionuclides","headers":["Nuclide","Half-life","Decay constant λ","Typical use"],"rows":[["F-18","109.77 min","0.3789 per hour","PET imaging (FDG and other tracers)"],["Ga-68","67.71 min","0.6142 per hour","PET imaging (PSMA, somatostatin receptors)"],["Tc-99m","6.0072 h","0.1154 per hour","SPECT and planar imaging (bone, cardiac, renal, thyroid)"],["I-123","13.2230 h","0.05242 per hour","Thyroid imaging and uptake"],["Y-90","64.05 h","0.01082 per hour","Liver radioembolisation"],["In-111","2.8047 d","0.0103 per hour","SPECT (labelled white cells, octreotide)"],["Tl-201","3.0420 d","0.009494 per hour","Myocardial perfusion (legacy)"],["Ga-67","3.2617 d","0.008855 per hour","Infection and lymphoma imaging"],["Xe-133","5.2475 d","0.005504 per hour","Lung ventilation imaging"],["Lu-177","6.6443 d","0.004347 per hour","Radionuclide therapy (PSMA, somatostatin receptors)"],["I-131","8.0252 d","0.003599 per hour","Thyroid therapy and imaging"]]},{"title":"Millicuries to megabecquerels","headers":["Millicuries (mCi)","Megabecquerels (MBq)","Gigabecquerels (GBq)"],"rows":[["0.1","3.7","0.0037"],["0.25","9.25","0.0093"],["0.5","18.5","0.0185"],["1","37","0.037"],["2","74","0.074"],["3","111","0.111"],["4","148","0.148"],["5","185","0.185"],["6","222","0.222"],["8","296","0.296"],["10","370","0.37"],["12","444","0.444"],["15","555","0.555"],["20","740","0.74"],["25","925","0.925"],["30","1,110","1.11"],["40","1,480","1.48"],["50","1,850","1.85"],["100","3,700","3.7"],["200","7,400","7.4"]]},{"title":"Megabecquerels to millicuries","headers":["Megabecquerels (MBq)","Millicuries (mCi)"],"rows":[["1","0.027"],["10","0.27"],["37","1"],["50","1.351"],["74","2"],["100","2.703"],["150","4.054"],["185","5"],["200","5.405"],["250","6.757"],["370","10"],["400","10.811"],["500","13.514"],["555","15"],["740","20"],["925","25"],["1,000","27.027"],["1,110","30"],["3,700","100"],["7,400","200"]]},{"title":"Tc-99m decay (half-life 6.0072 h)","headers":["Hours elapsed","Fraction remaining","Percent remaining"],"rows":[["0","1.0000","100.0"],["0.5","0.9439","94.4"],["1","0.8910","89.1"],["1.5","0.8411","84.1"],["2","0.7939","79.4"],["2.5","0.7494","74.9"],["3","0.7074","70.7"],["3.5","0.6677","66.8"],["4","0.6303","63.0"],["4.5","0.5950","59.5"],["5","0.5616","56.2"],["5.5","0.5301","53.0"],["6","0.5004","50.0"],["6.5","0.4724","47.2"],["7","0.4459","44.6"],["7.5","0.4209","42.1"],["8","0.3973","39.7"],["8.5","0.3750","37.5"],["9","0.3540","35.4"],["9.5","0.3341","33.4"],["10","0.3154","31.5"],["10.5","0.2977","29.8"],["11","0.2810","28.1"],["11.5","0.2653","26.5"],["12","0.2504","25.0"],["12.5","0.2364","23.6"],["13","0.2231","22.3"],["13.5","0.2106","21.1"],["14","0.1988","19.9"],["14.5","0.1877","18.8"],["15","0.1771","17.7"],["15.5","0.1672","16.7"],["16","0.1578","15.8"],["16.5","0.1490","14.9"],["17","0.1406","14.1"],["17.5","0.1328","13.3"],["18","0.1253","12.5"],["18.5","0.1183","11.8"],["19","0.1117","11.2"],["19.5","0.1054","10.5"],["20","0.0995","9.9"],["20.5","0.0939","9.4"],["21","0.0886","8.9"],["21.5","0.0837","8.4"],["22","0.0790","7.9"],["22.5","0.0746","7.5"],["23","0.0704","7.0"],["23.5","0.0664","6.6"],["24","0.0627","6.3"]]},{"title":"F-18 decay (half-life 109.77 min)","headers":["Minutes elapsed","Fraction remaining","Percent remaining"],"rows":[["0","1.0000","100.0"],["10","0.9388","93.9"],["20","0.8814","88.1"],["30","0.8274","82.7"],["40","0.7768","77.7"],["50","0.7293","72.9"],["60","0.6846","68.5"],["70","0.6427","64.3"],["80","0.6034","60.3"],["90","0.5665","56.6"],["100","0.5318","53.2"],["110","0.4993","49.9"],["120","0.4687","46.9"],["130","0.4400","44.0"],["140","0.4131","41.3"],["150","0.3878","38.8"],["160","0.3641","36.4"],["170","0.3418","34.2"],["180","0.3209","32.1"],["190","0.3013","30.1"],["200","0.2828","28.3"],["210","0.2655","26.6"],["220","0.2493","24.9"],["230","0.2340","23.4"],["240","0.2197","22.0"],["250","0.2063","20.6"],["260","0.1936","19.4"],["270","0.1818","18.2"],["280","0.1707","17.1"],["290","0.1602","16.0"],["300","0.1504","15.0"]]},{"title":"Ga-68 decay (half-life 67.71 min)","headers":["Minutes elapsed","Fraction remaining","Percent remaining"],"rows":[["0","1.0000","100.0"],["10","0.9027","90.3"],["20","0.8149","81.5"],["30","0.7356","73.6"],["40","0.6640","66.4"],["50","0.5994","59.9"],["60","0.5411","54.1"],["70","0.4884","48.8"],["80","0.4409","44.1"],["90","0.3980","39.8"],["100","0.3593","35.9"],["110","0.3243","32.4"],["120","0.2927","29.3"],["130","0.2643","26.4"],["140","0.2385","23.9"],["150","0.2153","21.5"],["160","0.1944","19.4"],["170","0.1755","17.5"],["180","0.1584","15.8"],["190","0.1430","14.3"],["200","0.1291","12.9"],["210","0.1165","11.7"],["220","0.1052","10.5"],["230","0.0949","9.5"],["240","0.0857","8.6"]]},{"title":"I-123 decay (half-life 13.2230 h)","headers":["Hours elapsed","Fraction remaining","Percent remaining"],"rows":[["0","1.0000","100.0"],["2","0.9005","90.0"],["4","0.8108","81.1"],["6","0.7301","73.0"],["8","0.6575","65.7"],["10","0.5920","59.2"],["12","0.5331","53.3"],["14","0.4800","48.0"],["16","0.4323","43.2"],["18","0.3892","38.9"],["20","0.3505","35.0"],["22","0.3156","31.6"],["24","0.2842","28.4"],["26","0.2559","25.6"],["28","0.2304","23.0"],["30","0.2075","20.8"],["32","0.1869","18.7"],["34","0.1683","16.8"],["36","0.1515","15.2"],["38","0.1364","13.6"],["40","0.1228","12.3"],["42","0.1106","11.1"],["44","0.0996","10.0"],["46","0.0897","9.0"],["48","0.0808","8.1"]]},{"title":"I-131 decay (half-life 8.0252 d)","headers":["Days elapsed","Fraction remaining","Percent remaining"],"rows":[["0","1.0000","100.0"],["2","0.8414","84.1"],["4","0.7079","70.8"],["6","0.5956","59.6"],["8","0.5011","50.1"],["10","0.4216","42.2"],["12","0.3547","35.5"],["14","0.2984","29.8"],["16","0.2511","25.1"],["18","0.2113","21.1"],["20","0.1777","17.8"],["22","0.1495","15.0"],["24","0.1258","12.6"],["26","0.1059","10.6"],["28","0.0891","8.9"],["30","0.0749","7.5"],["32","0.0630","6.3"],["34","0.0530","5.3"],["36","0.0446","4.5"],["38","0.0375","3.8"],["40","0.0316","3.2"],["42","0.0266","2.7"],["44","0.0224","2.2"],["46","0.0188","1.9"],["48","0.0158","1.6"],["50","0.0133","1.3"],["52","0.0112","1.1"],["54","0.0094","0.9"],["56","0.0079","0.8"]]},{"title":"Lu-177 decay (half-life 6.6443 d)","headers":["Days elapsed","Fraction remaining","Percent remaining"],"rows":[["0","1.0000","100.0"],["2","0.8117","81.2"],["4","0.6588","65.9"],["6","0.5348","53.5"],["8","0.4341","43.4"],["10","0.3523","35.2"],["12","0.2860","28.6"],["14","0.2321","23.2"],["16","0.1884","18.8"],["18","0.1529","15.3"],["20","0.1241","12.4"],["22","0.1008","10.1"],["24","0.0818","8.2"],["26","0.0664","6.6"],["28","0.0539","5.4"],["30","0.0437","4.4"],["32","0.0355","3.5"],["34","0.0288","2.9"],["36","0.0234","2.3"],["38","0.0190","1.9"],["40","0.0154","1.5"],["42","0.0125","1.3"]]},{"title":"Effective dose from an administered activity","headers":["Step","Detail"],"rows":[["Formula","Effective dose (mSv) = administered activity (MBq) × dose coefficient (mSv/MBq)"],["Coefficients","ICRP Publication 128 tabulates dose coefficients by radiopharmaceutical for adults and children."],["Worked example","370 MBq of F-18 FDG × 0.019 mSv/MBq (adult) = 7.0 mSv"],["Clinical use","For reference and teaching. Prescribe and verify activities with local protocols and a calibrated dose calibrator."]]}]}