<div class="ec-radio">
 {% for key, child in form.Payment %}
   <div style="display: block;">
    {% set Payment = form.Payment.vars.choices[key].data %}
    {{ form_widget(child, { 'attr': { 'data-trigger': 'change' }})}}
    {% if Payment.payment_image is not null %}
     <p><img src="{{ asset(Payment.payment_image, 'save_image') }}"></p>
    {% endif %}
   </div>
  {% endfor %}
</div>

form_widget