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The following was received from the Califo … The following was received from the California Department of Public Health via email:</br>On May 12, 2021, licensee notified the (Radiologic Health Branch) RHB of a possible medical event which occurred on May 10, 2021 involving a Gamma Knife patient who likely received a dose greater than 0.5 Sv (50 rem) to a tissue other than the treatment site and over 50% of the expected dose to that site from the procedure if the administration had been given in accordance with the written directive. No further details have been provided at this time. The licensee is currently investigating and will provide a full report within 15 days. RHB is investigating this event.</br>California Item Number: 051221</br>* * * RETRACTION ON 1 JUNE 2021 AT 1454 EDT FROM L. ROBERT GREGER TO JOANNA BRIDGE * * *</br>The following was received via e-mail from the state of California via e-mail:</br>The licensee's initial dose calculation performed on the impacted non-target tissue was made to a non-dimensional point adjacent to the target tissue. Upon further licensee consideration, the non-target dose calculation was performed on the 1.55 cc non-target tissue (muscle) most impacted by a planning error for the gamma knife treatment. The revised calculation resulted in a dose to the non-target muscle tissue of 140 rad (1.4 Gy) compared to the 120 rad (1.2 Gy) that the 1.55 cc non-target muscle tissue would have received had the planning error not occurred. Therefore, the Medical Event criterion was not exceeded.</br>Notified R4DO (Groom) and NMSS Events (by email). </br>A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.necessarily result in harm to the patient. +
00:00:00, 12 May 2021 +
55,257 +
20:41:00, 13 May 2021 +
00:00:00, 12 May 2021 +
The following was received from the Califo … The following was received from the California Department of Public Health via email:</br>On May 12, 2021, licensee notified the (Radiologic Health Branch) RHB of a possible medical event which occurred on May 10, 2021 involving a Gamma Knife patient who likely received a dose greater than 0.5 Sv (50 rem) to a tissue other than the treatment site and over 50% of the expected dose to that site from the procedure if the administration had been given in accordance with the written directive. No further details have been provided at this time. The licensee is currently investigating and will provide a full report within 15 days. RHB is investigating this event.</br>California Item Number: 051221</br>* * * RETRACTION ON 1 JUNE 2021 AT 1454 EDT FROM L. ROBERT GREGER TO JOANNA BRIDGE * * *</br>The following was received via e-mail from the state of California via e-mail:</br>The licensee's initial dose calculation performed on the impacted non-target tissue was made to a non-dimensional point adjacent to the target tissue. Upon further licensee consideration, the non-target dose calculation was performed on the 1.55 cc non-target tissue (muscle) most impacted by a planning error for the gamma knife treatment. The revised calculation resulted in a dose to the non-target muscle tissue of 140 rad (1.4 Gy) compared to the 120 rad (1.2 Gy) that the 1.55 cc non-target muscle tissue would have received had the planning error not occurred. Therefore, the Medical Event criterion was not exceeded.</br>Notified R4DO (Groom) and NMSS Events (by email). </br>A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.necessarily result in harm to the patient. +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
00:00:00, 3 June 2021 +
CA-RML 1334-57 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
11:30:11, 4 June 2021 +
20:41:00, 13 May 2021 +
1.862 d (44.68 hours, 0.266 weeks, 0.0612 months) +
00:00:00, 12 May 2021 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.