[Intl_DxMedPhys] [EXTERNAL] ACR CT Pediatric Clinical Image Question

[Douglas Pfeiffer]

As Keith Strauss has graphically demonstrated, patient size and age have basically no relationship. That dose is pretty low for 175 lbs, so if the clinical reviewers like the image quality, you’ll be fine.

Best regards,
Doug



Douglas Pfeiffer, MS, DABR FACR, FAAPM
Medical Physicist, Radiation Safety Officer
Boulder Community Health
xraydoug at me.com
303.415.7515

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The opinions expressed in this message are the product of the gray and white matter loitering in my cranium. I speak for myself and no one else, unless I say otherwise.

> On Apr 1, 2025, at 4:33 PM, Timmerman,Michael <Michael.Timmerman at SanfordHealth.org> wrote:
> 
> Thanks Doug! Yes, I was referring to the clinical images here. The patient is around 175 lbs. and the CTDI is around 11 mGy (reported using the 32 cm phantom) so I don’t expect the ACR would have an issue with this dose. It’s a bit higher than I would like for this age range but not egregious at all.
>  
> Best,
>  
> Mike
> ________________________________________
> Mike Timmerman, MS, DABR
> Diagnostic Medical Physicist
> Sanford Health – Sioux Falls Region
> Mobile: (541) 213-1075
> <image001.png>
> 
>  
> From: Douglas Pfeiffer <xraydoug at me.com <mailto:xraydoug at me.com>>
> Sent: Tuesday, April 1, 2025 3:19 PM
> To: Timmerman,Michael <Michael.Timmerman at SanfordHealth.org <mailto:Michael.Timmerman at SanfordHealth.org>>
> Cc: intl_dxmedphys_wd_osu_list at lists.osu.edu <mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu>
> Subject: [EXTERNAL] Re: [Intl_DxMedPhys] ACR CT Pediatric Clinical Image Question
>  
> Michael,
>  
> The dosimetry is evaluated by the ACR only for that patient size. There is no limit placed on other patient sizes. Please note that the phantom and CTDI testing are independent of the clinical exams that are being submitted.,
>  
> Best regards,
> Doug
>  
>  
>  
> Douglas Pfeiffer, MS, DABR FACR, FAAPM
> Medical Physicist, Radiation Safety Officer
> Boulder Community Health
> xraydoug at me.com <mailto:xraydoug at me.com>
> 303.415.7515
>  
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>  
> The opinions expressed in this message are the product of the gray and white matter loitering in my cranium. I speak for myself and no one else, unless I say otherwise.
> 
> 
> On Apr 1, 2025, at 3:03 PM, Timmerman, Michael via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu <mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu>> wrote:
>  
> Hi all,
>  
> It’s been a while since I’ve reviewed clinical images for ACR accreditation. I have a quick question regarding pediatric abdomen pelvis exams. The pass/fail criteria is 10 mGy for the 32 cm phantom but this value is for a 40-50 lb. patient; are there any guidelines for pass/fail criteria for older (and therefore larger) pediatric patients who may exceed this level?
>  
> Thanks!
> 
> 
> Best,
>  
> Mike
> ________________________________________
> Mike Timmerman, MS, DABR
> Diagnostic Medical Physicist
> Sanford Health – Sioux Falls Region
> Mobile: (541) 213-1075
> <image001.png>
> 
>  
> 
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