| 2026-02-15 | X-ray units |
| 2025-04-20 | X-ray doses |
| 2024-02-09 | Exposure units |
| 2021-12-19 | Nuclear medicine units |
| 2019-10-18 | Dosimeter units |
| 2019-08-30 | X-ray units |
| 2017-06-11 | They may be high in a fallout zone |
| 2016-08-18 | Dosimeter reading |
| 2016-08-13 | CAT scan units |
| 2016-04-24 | Physics units |
| 2015-06-22 | X-ray units |
| 2014-06-22 | Dangerous units |
| 2013-10-09 | Exposure units |
| 2013-05-14 | X-ray units |
| 2012-10-30 | Units of a dangerous dosage |
| 2012-06-26 | X-ray units |
| 2011-11-20 | X-ray units |
| 2010-06-11 | Dosimeters measure them |
| 2010-03-24 | X-ray dosage units |
| 2010-03-19 | Dosage units |
| 2008-05-18 | X-ray units |
| 2007-11-25 | X-ray doses |
| 2007-06-10 | CAT scan units |
| 2007-02-26 | X-ray units |
| 2006-11-30 | Physics units also known as centigrays |
| 2006-06-10 | Units of 100 ergs per gram |
| 2006-05-15 | X-ray units |
| 2006-04-16 | Dosage units |
| 2005-08-14 | Exposure units |
| 2003-02-16 | X-ray doses |
| 2001-06-30 | Units of 100 ergs/gram |
| 2001-05-04 | Dangerous dosage units |
| 1998-12-06 | Physics units |
| 1998-09-23 | X-ray units |
| 1998-02-17 | Physics units |
| 1995-08-16 | X-ray units |
| 1995-08-11 | Dosimeters measure them |