* 1. We are often asked to assist in placement of a ph probe in children of various ages. The electrode is supposed to be at a level of 2.5 cm above the location of the lower esophageal sphincter. Since we are not aware of a suitable landmark for the LES, we would welcome the input from the membership as to where they would place the LES on a frontal chest film. We have noted the level of T10 in each of the 4 cases

* 2. Are you asked to help in placement of the lower esophageal sphincter in patients who are having a ph probe study, using a frontal chest film?

* 3. Please locate where you would place the LES in the following 4 patients, which are of varying ages: You can choose numbers 1 through 5 or anywhere in-between. We are only interested in where you would feel the LES is located in each of these cases.

Case 1- 8mo old

Case 1- 8mo old

* 4. Where would you place the location of the lower esophageal sphincter (LES)on Case 1? Choose anywhere along the line, from 1 to 5 or anywhere in between

Case 2 5y9mo

Case 2 5y9mo

* 5. Where would you place the location of the lower esophageal sphincter (LES)on Case 2? Choose anywhere along the line, from 1 to 5 or anywhere in between

Case 3 13y5mo

Case 3 13y5mo

* 6. Where would you place the location of the lower esophageal sphincter (LES)on Case 3? Choose anywhere along the line, from 1 to 5 or anywhere in between

Case 4 3y4mo

Case 4 3y4mo

* 7. Where would you place the location of the lower esophageal sphincter (LES) on Case 4? Choose anywhere along the line, from 1 to 5 or anywhere in between

* 8. Do you use a certain anatomic landmark to determine the level of the LES? If "yes" please explain.

* 9. How long have you been practicing Pediatric Imaging?

* 10. Thank you very much for your input! We shall tabulate the responses and present them to the membership as a brief presentation or poster

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